99579657618 has 48 divisors (see below), whose sum is σ = 246597039936. Its totient is φ = 28449156960.

The previous prime is 99579657607. The next prime is 99579657631. The reversal of 99579657618 is 81675697599.

It is a super-2 number, since 2×99579657618² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2396205 + ... + 2437407.

It is an arithmetic number, because the mean of its divisors is an integer number (5137438332).

Almost surely, 2^99579657618 is an apocalyptic number.

99579657618 is an abundant number, since it is smaller than the sum of its proper divisors (147017382318).

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

99579657618 is a wasteful number, since it uses less digits than its factorization.

99579657618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60399 (or 60396 counting only the distinct ones).

The product of its digits is 257191200, while the sum is 72.

The spelling of 99579657618 in words is "ninety-nine billion, five hundred seventy-nine million, six hundred fifty-seven thousand, six hundred eighteen".