12911178951 has 20 divisors (see below), whose sum is σ = 21040441224. Its totient is φ = 7824956400.

The previous prime is 12911178941. The next prime is 12911178953. The reversal of 12911178951 is 15987111921.

It is not a de Polignac number, because 12911178951 - 2¹¹ = 12911176903 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12911178897 and 12911178906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911178953) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7244440 + ... + 7246221.

Almost surely, 2^12911178951 is an apocalyptic number.

12911178951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12911178951 is a deficient number, since it is larger than the sum of its proper divisors (8129262273).

12911178951 is a wasteful number, since it uses less digits than its factorization.

12911178951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490684 (or 14490675 counting only the distinct ones).

The product of its digits is 45360, while the sum is 45.

The spelling of 12911178951 in words is "twelve billion, nine hundred eleven million, one hundred seventy-eight thousand, nine hundred fifty-one".