89856564618 has 32 divisors (see below), whose sum is σ = 180216648000. Its totient is φ = 29868322176.

The previous prime is 89856564601. The next prime is 89856564631. The reversal of 89856564618 is 81646565898.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10054480 + ... + 10063412.

It is an arithmetic number, because the mean of its divisors is an integer number (5631770250).

Almost surely, 2^89856564618 is an apocalyptic number.

89856564618 is an abundant number, since it is smaller than the sum of its proper divisors (90360083382).

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

89856564618 is a wasteful number, since it uses less digits than its factorization.

89856564618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13446.

The product of its digits is 99532800, while the sum is 66.

The spelling of 89856564618 in words is "eighty-nine billion, eight hundred fifty-six million, five hundred sixty-four thousand, six hundred eighteen".