12990716956 has 24 divisors (see below), whose sum is σ = 26095902336. Its totient is φ = 5542921200.

The previous prime is 12990716941. The next prime is 12990716989. The reversal of 12990716956 is 65961709921.

It is a junction number, because it is equal to n+sod(n) for n = 12990716897 and 12990716906.

It is a congruent number.

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, 1015570 + ... + 1028281.

It is an arithmetic number, because the mean of its divisors is an integer number (1087329264).

Almost surely, 2^12990716956 is an apocalyptic number.

It is an amenable number.

12990716956 is an abundant number, since it is smaller than the sum of its proper divisors (13105185380).

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

12990716956 is a wasteful number, since it uses less digits than its factorization.

12990716956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044089 (or 2044087 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 12990716956 in words is "twelve billion, nine hundred ninety million, seven hundred sixteen thousand, nine hundred fifty-six".