102638135155618 has 16 divisors (see below), whose sum is σ = 157237476753024. Its totient is φ = 50225706638800.

The previous prime is 102638135155529. The next prime is 102638135155637. The reversal of 102638135155618 is 816551531836201.

It is a happy number.

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, 12692080 + ... + 19140667.

It is an arithmetic number, because the mean of its divisors is an integer number (9827342297064).

Almost surely, 2^{102638135155618} is an apocalyptic number.

102638135155618 is a deficient number, since it is larger than the sum of its proper divisors (54599341597406).

102638135155618 is a wasteful number, since it uses less digits than its factorization.

102638135155618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31867097.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 102638135155618 in words is "one hundred two trillion, six hundred thirty-eight billion, one hundred thirty-five million, one hundred fifty-five thousand, six hundred eighteen".