12566622256 has 20 divisors (see below), whose sum is σ = 24350230672. Its totient is φ = 6282691776.

The previous prime is 12566622253. The next prime is 12566622283. The reversal of 12566622256 is 65222666521.

It is not an unprimeable number, because it can be changed into a prime (12566622251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159406 + ... + 224818.

Almost surely, 2^12566622256 is an apocalyptic number.

12566622256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12566622256 is a deficient number, since it is larger than the sum of its proper divisors (11783608416).

12566622256 is a wasteful number, since it uses less digits than its factorization.

12566622256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77428 (or 77422 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 12566622256 in words is "twelve billion, five hundred sixty-six million, six hundred twenty-two thousand, two hundred fifty-six".