12638660616 has 48 divisors (see below), whose sum is σ = 36031273200. Its totient is φ = 3991155552.

The previous prime is 12638660581. The next prime is 12638660627. The reversal of 12638660616 is 61606683621.

12638660616 is a `hidden beast` number, since 1 + 2 + 6 + 38 + 6 + 606 + 1 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4618026 + ... + 4620761.

It is an arithmetic number, because the mean of its divisors is an integer number (750651525).

Almost surely, 2^12638660616 is an apocalyptic number.

It is an amenable number.

12638660616 is an abundant number, since it is smaller than the sum of its proper divisors (23392612584).

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

12638660616 is a wasteful number, since it uses less digits than its factorization.

12638660616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238818 (or 9238811 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 12638660616 in words is "twelve billion, six hundred thirty-eight million, six hundred sixty thousand, six hundred sixteen".