12639916543680 has 168 divisors, whose sum is σ = 43551400437792. Its totient is φ = 3364802297856.

The previous prime is 12639916543613. The next prime is 12639916543691. The reversal of 12639916543680 is 8634561993621.

12639916543680 is a `hidden beast` number, since 1 + 2 + 6 + 3 + 9 + 9 + 1 + 6 + 543 + 6 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2141412 + ... + 5464931.

Almost surely, 2^{12639916543680} is an apocalyptic number.

12639916543680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12639916543680 is an abundant number, since it is smaller than the sum of its proper divisors (30911483894112).

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

12639916543680 is a wasteful number, since it uses less digits than its factorization.

12639916543680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606943 (or 7606930 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 12639916543680 in words is "twelve trillion, six hundred thirty-nine billion, nine hundred sixteen million, five hundred forty-three thousand, six hundred eighty".