12656803720 has 64 divisors (see below), whose sum is σ = 31089277440. Its totient is φ = 4599129600.

The previous prime is 12656803717. The next prime is 12656803777. The reversal of 12656803720 is 2730865621.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 641929 + ... + 661351.

It is an arithmetic number, because the mean of its divisors is an integer number (485769960).

Almost surely, 2^12656803720 is an apocalyptic number.

12656803720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12656803720 is an abundant number, since it is smaller than the sum of its proper divisors (18432473720).

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

12656803720 is a wasteful number, since it uses less digits than its factorization.

12656803720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20926 (or 20922 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 12656803720 in words is "twelve billion, six hundred fifty-six million, eight hundred three thousand, seven hundred twenty".