12912392816 has 10 divisors (see below), whose sum is σ = 25017761112. Its totient is φ = 6456196400.

The previous prime is 12912392807. The next prime is 12912392821. The reversal of 12912392816 is 61829321921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403512260 + ... + 403512291.

Almost surely, 2^12912392816 is an apocalyptic number.

12912392816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12912392816 is a deficient number, since it is larger than the sum of its proper divisors (12105368296).

12912392816 is an equidigital number, since it uses as much as digits as its factorization.

12912392816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807024559 (or 807024553 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The spelling of 12912392816 in words is "twelve billion, nine hundred twelve million, three hundred ninety-two thousand, eight hundred sixteen".