12656380761 has 32 divisors (see below), whose sum is σ = 19241712000. Its totient is φ = 8218701504.

The previous prime is 12656380753. The next prime is 12656380777. The reversal of 12656380761 is 16708365621.

12656380761 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 638 + 0 + 7 + 6 + 1 = 666.

It is not a de Polignac number, because 12656380761 - 2³ = 12656380753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12656387761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167095 + ... + 230723.

It is an arithmetic number, because the mean of its divisors is an integer number (601303500).

Almost surely, 2^12656380761 is an apocalyptic number.

It is an amenable number.

12656380761 is a deficient number, since it is larger than the sum of its proper divisors (6585331239).

12656380761 is a wasteful number, since it uses less digits than its factorization.

12656380761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63830 (or 63824 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 12656380761 in words is "twelve billion, six hundred fifty-six million, three hundred eighty thousand, seven hundred sixty-one".