4545499981 has 4 divisors (see below), whose sum is σ = 4958727264. Its totient is φ = 4132272700.

The previous prime is 4545499969. The next prime is 4545499997. The reversal of 4545499981 is 1899945454.

4545499981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4545499981 - 2⁵ = 4545499949 is a prime.

It is a super-2 number, since 2×4545499981² = 41323140154542000722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4545499921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206613625 + ... + 206613646.

It is an arithmetic number, because the mean of its divisors is an integer number (1239681816).

Almost surely, 2^4545499981 is an apocalyptic number.

It is an amenable number.

4545499981 is a deficient number, since it is larger than the sum of its proper divisors (413227283).

4545499981 is a wasteful number, since it uses less digits than its factorization.

4545499981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413227282.

The product of its digits is 9331200, while the sum is 58.

The square root of 4545499981 is about 67420.3232045056. The cubic root of 4545499981 is about 1656.5093317127.

The spelling of 4545499981 in words is "four billion, five hundred forty-five million, four hundred ninety-nine thousand, nine hundred eighty-one".