115662120657 has 32 divisors (see below), whose sum is σ = 160110720000. Its totient is φ = 74208607488.

The previous prime is 115662120649. The next prime is 115662120689. The reversal of 115662120657 is 756021266511.

It is not a de Polignac number, because 115662120657 - 2³ = 115662120649 is a prime.

It is a super-2 number, since 2×115662120657² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115662120617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7336219 + ... + 7351967.

It is an arithmetic number, because the mean of its divisors is an integer number (5003460000).

Almost surely, 2^115662120657 is an apocalyptic number.

It is an amenable number.

115662120657 is a deficient number, since it is larger than the sum of its proper divisors (44448599343).

115662120657 is a wasteful number, since it uses less digits than its factorization.

115662120657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 115662120657 in words is "one hundred fifteen billion, six hundred sixty-two million, one hundred twenty thousand, six hundred fifty-seven".