12911117618 has 16 divisors (see below), whose sum is σ = 22508487360. Its totient is φ = 5439550416.

The previous prime is 12911117603. The next prime is 12911117623. The reversal of 12911117618 is 81671111921.

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, 7814621 + ... + 7816272.

It is an arithmetic number, because the mean of its divisors is an integer number (1406780460).

Almost surely, 2^12911117618 is an apocalyptic number.

12911117618 is a deficient number, since it is larger than the sum of its proper divisors (9597369742).

12911117618 is a wasteful number, since it uses less digits than its factorization.

12911117618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630961.

The product of its digits is 6048, while the sum is 38.

The spelling of 12911117618 in words is "twelve billion, nine hundred eleven million, one hundred seventeen thousand, six hundred eighteen".