12911117616 has 60 divisors (see below), whose sum is σ = 36672526072. Its totient is φ = 4239468288.

The previous prime is 12911117603. The next prime is 12911117623. The reversal of 12911117616 is 61671111921.

12911117616 is a `hidden beast` number, since 1 + 29 + 1 + 1 + 1 + 17 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659461 + ... + 678756.

Almost surely, 2^12911117616 is an apocalyptic number.

12911117616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12911117616 is an abundant number, since it is smaller than the sum of its proper divisors (23761408456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12911117616 is a wasteful number, since it uses less digits than its factorization.

12911117616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338298 (or 1338289 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The spelling of 12911117616 in words is "twelve billion, nine hundred eleven million, one hundred seventeen thousand, six hundred sixteen".