12564662416 has 20 divisors (see below), whose sum is σ = 24441029424. Its totient is φ = 6257300000.

The previous prime is 12564662371. The next prime is 12564662423. The reversal of 12564662416 is 61426646521.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560310 + ... + 1568341.

Almost surely, 2^12564662416 is an apocalyptic number.

12564662416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12564662416 is a deficient number, since it is larger than the sum of its proper divisors (11876367008).

12564662416 is a wasteful number, since it uses less digits than its factorization.

12564662416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128910 (or 3128904 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The spelling of 12564662416 in words is "twelve billion, five hundred sixty-four million, six hundred sixty-two thousand, four hundred sixteen".