4545454545 has 48 divisors (see below), whose sum is σ = 8101626624. Its totient is φ = 2356128000.

The previous prime is 4545454541. The next prime is 4545454549. The reversal of 4545454545 is 5454545454.

4545454545 is a `hidden beast` number, since 4 + 5 + 4 + 54 + 54 + 545 = 666.

4545454545 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (4545454541) and next prime (4545454549).

It is not a de Polignac number, because 4545454545 - 2² = 4545454541 is a prime.

It is a super-2 number, since 2×4545454545² = 41322314041322314050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an alternating number because its digits alternate between even and odd.

4545454545 is an undulating number in base 10.

4545454545 is a modest number, since divided by 454545 gives 4545 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 4545454545.

It is not an unprimeable number, because it can be changed into a prime (4545454541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 495450 + ... + 504540.

It is an arithmetic number, because the mean of its divisors is an integer number (168783888).

Almost surely, 2^4545454545 is an apocalyptic number.

4545454545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4545454545 is a deficient number, since it is larger than the sum of its proper divisors (3556172079).

4545454545 is a wasteful number, since it uses less digits than its factorization.

4545454545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414 (or 9411 counting only the distinct ones).

The product of its digits is 3200000, while the sum is 45.

The square root of 4545454545 is about 67419.9862429532. The cubic root of 4545454545 is about 1656.5038123046.

4545454545 divided by its sum of digits (45) gives a palindrome (101010101).

Adding to 4545454545 its reverse (5454545454), we get a palindrome (9999999999).

Subtracting 4545454545 from its reverse (5454545454), we obtain a palindrome (909090909).

It can be divided in two parts, 45454 and 54545, that added together give a palindrome (99999).

The spelling of 4545454545 in words is "four billion, five hundred forty-five million, four hundred fifty-four thousand, five hundred forty-five".