12519966816 has 72 divisors (see below), whose sum is σ = 40689898704. Its totient is φ = 3577132800.

The previous prime is 12519966769. The next prime is 12519966821. The reversal of 12519966816 is 61866991521.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3103135 + ... + 3107166.

It is an arithmetic number, because the mean of its divisors is an integer number (565137482).

Almost surely, 2^12519966816 is an apocalyptic number.

12519966816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12519966816 is an abundant number, since it is smaller than the sum of its proper divisors (28169931888).

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

12519966816 is a wasteful number, since it uses less digits than its factorization.

12519966816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210324 (or 6210313 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 12519966816 in words is "twelve billion, five hundred nineteen million, nine hundred sixty-six thousand, eight hundred sixteen".