12309479656 has 16 divisors (see below), whose sum is σ = 23170084740. Its totient is φ = 6130790400.

The previous prime is 12309479621. The next prime is 12309479671. The reversal of 12309479656 is 65697490321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11699883556 + 609596100 = 108166^2 + 24690^2 .

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, 2991495 + ... + 2995606.

Almost surely, 2^12309479656 is an apocalyptic number.

It is an amenable number.

12309479656 is a deficient number, since it is larger than the sum of its proper divisors (10860605084).

12309479656 is a wasteful number, since it uses less digits than its factorization.

12309479656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987364 (or 5987360 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 12309479656 in words is "twelve billion, three hundred nine million, four hundred seventy-nine thousand, six hundred fifty-six".