12919773856 has 24 divisors (see below), whose sum is σ = 27748151424. Its totient is φ = 5872624320.

The previous prime is 12919773817. The next prime is 12919773857. The reversal of 12919773856 is 65837791921.

It is a super-2 number, since 2×12919773856² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12919773856.

It is not an unprimeable number, because it can be changed into a prime (12919773857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18351600 + ... + 18352303.

It is an arithmetic number, because the mean of its divisors is an integer number (1156172976).

Almost surely, 2^12919773856 is an apocalyptic number.

12919773856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12919773856 is an abundant number, since it is smaller than the sum of its proper divisors (14828377568).

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

12919773856 is a wasteful number, since it uses less digits than its factorization.

12919773856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703924 (or 36703916 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 58.

The spelling of 12919773856 in words is "twelve billion, nine hundred nineteen million, seven hundred seventy-three thousand, eight hundred fifty-six".