12656253906 has 48 divisors (see below), whose sum is σ = 28138451328. Its totient is φ = 4109364000.

The previous prime is 12656253881. The next prime is 12656253943. The reversal of 12656253906 is 60935265621.

12656253906 is a `hidden beast` number, since 12 + 6 + 5 + 625 + 3 + 9 + 0 + 6 = 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, 143056 + ... + 213956.

It is an arithmetic number, because the mean of its divisors is an integer number (586217736).

Almost surely, 2^12656253906 is an apocalyptic number.

12656253906 is an abundant number, since it is smaller than the sum of its proper divisors (15482197422).

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

12656253906 is a wasteful number, since it uses less digits than its factorization.

12656253906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71167 (or 71164 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 12656253906 in words is "twelve billion, six hundred fifty-six million, two hundred fifty-three thousand, nine hundred six".