12813809956 has 24 divisors (see below), whose sum is σ = 24031546560. Its totient is φ = 5962711392.

The previous prime is 12813809929. The next prime is 12813809989. The reversal of 12813809956 is 65990831821.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

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, 1878766 + ... + 1885573.

It is an arithmetic number, because the mean of its divisors is an integer number (1001314440).

Almost surely, 2^12813809956 is an apocalyptic number.

It is an amenable number.

12813809956 is a deficient number, since it is larger than the sum of its proper divisors (11217736604).

12813809956 is a wasteful number, since it uses less digits than its factorization.

12813809956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3764403 (or 3764401 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 12813809956 in words is "twelve billion, eight hundred thirteen million, eight hundred nine thousand, nine hundred fifty-six".