4551813618 has 16 divisors (see below), whose sum is σ = 9931229856. Its totient is φ = 1379337440.

The previous prime is 4551813613. The next prime is 4551813619. The reversal of 4551813618 is 8163181554.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4551813618.

It is not an unprimeable number, because it can be changed into a prime (4551813613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34483371 + ... + 34483502.

It is an arithmetic number, because the mean of its divisors is an integer number (620701866).

Almost surely, 2^4551813618 is an apocalyptic number.

4551813618 is an abundant number, since it is smaller than the sum of its proper divisors (5379416238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4551813618 is a wasteful number, since it uses less digits than its factorization.

4551813618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68966889.

The product of its digits is 115200, while the sum is 42.

The square root of 4551813618 is about 67467.1299078299. The cubic root of 4551813618 is about 1657.2759331208.

The spelling of 4551813618 in words is "four billion, five hundred fifty-one million, eight hundred thirteen thousand, six hundred eighteen".