90979139201618 has 48 divisors (see below), whose sum is σ = 141660192371040. Its totient is φ = 43809513226752.

The previous prime is 90979139201507. The next prime is 90979139201707. The reversal of 90979139201618 is 81610293197909.

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, 222870005 + ... + 223277847.

It is an arithmetic number, because the mean of its divisors is an integer number (2951254007730).

Almost surely, 2^{90979139201618} is an apocalyptic number.

90979139201618 is a deficient number, since it is larger than the sum of its proper divisors (50681053169422).

90979139201618 is a wasteful number, since it uses less digits than its factorization.

90979139201618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408683 (or 408630 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 65.

The spelling of 90979139201618 in words is "ninety trillion, nine hundred seventy-nine billion, one hundred thirty-nine million, two hundred one thousand, six hundred eighteen".