18597139616 has 48 divisors (see below), whose sum is σ = 40537778400. Its totient is φ = 8327066880.

The previous prime is 18597139607. The next prime is 18597139619. The reversal of 18597139616 is 61693179581.

It is not an unprimeable number, because it can be changed into a prime (18597139619) 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, 370691 + ... + 417858.

It is an arithmetic number, because the mean of its divisors is an integer number (844537050).

Almost surely, 2^18597139616 is an apocalyptic number.

18597139616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18597139616 is an abundant number, since it is smaller than the sum of its proper divisors (21940638784).

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

18597139616 is a wasteful number, since it uses less digits than its factorization.

18597139616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788637 (or 788629 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 56.

The spelling of 18597139616 in words is "eighteen billion, five hundred ninety-seven million, one hundred thirty-nine thousand, six hundred sixteen".