12911894618 has 16 divisors (see below), whose sum is σ = 22139149824. Its totient is φ = 5532550800.

The previous prime is 12911894603. The next prime is 12911894647. The reversal of 12911894618 is 81649811921.

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, 19433 + ... + 161868.

It is an arithmetic number, because the mean of its divisors is an integer number (1383696864).

Almost surely, 2^12911894618 is an apocalyptic number.

12911894618 is a deficient number, since it is larger than the sum of its proper divisors (9227255206).

12911894618 is a wasteful number, since it uses less digits than its factorization.

12911894618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186397.

The product of its digits is 248832, while the sum is 50.

The spelling of 12911894618 in words is "twelve billion, nine hundred eleven million, eight hundred ninety-four thousand, six hundred eighteen".