115788391618 has 16 divisors (see below), whose sum is σ = 174736127160. Its totient is φ = 57544039296.

The previous prime is 115788391591. The next prime is 115788391627. The reversal of 115788391618 is 816193887511.

It can be written as a sum of positive squares in 4 ways, for example, as 82459142649 + 33329248969 = 287157^2 + 182563^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28921 + ... + 482092.

Almost surely, 2^115788391618 is an apocalyptic number.

115788391618 is a deficient number, since it is larger than the sum of its proper divisors (58947735542).

115788391618 is a wasteful number, since it uses less digits than its factorization.

115788391618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511701.

The product of its digits is 2903040, while the sum is 58.

The spelling of 115788391618 in words is "one hundred fifteen billion, seven hundred eighty-eight million, three hundred ninety-one thousand, six hundred eighteen".