12791993880 has 64 divisors (see below), whose sum is σ = 38521992960. Its totient is φ = 3398219648.

The previous prime is 12791993857. The next prime is 12791993899. The reversal of 12791993880 is 8839919721.

It is a self number, because there is not a number n which added to its sum of digits gives 12791993880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171102 + ... + 234221.

It is an arithmetic number, because the mean of its divisors is an integer number (601906140).

Almost surely, 2^12791993880 is an apocalyptic number.

12791993880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12791993880 is an abundant number, since it is smaller than the sum of its proper divisors (25729999080).

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

12791993880 is a wasteful number, since it uses less digits than its factorization.

12791993880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405600 (or 405596 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 12791993880 in words is "twelve billion, seven hundred ninety-one million, nine hundred ninety-three thousand, eight hundred eighty".