12564651251 has 2 divisors, whose sum is σ = 12564651252. Its totient is φ = 12564651250.

The previous prime is 12564651241. The next prime is 12564651277. The reversal of 12564651251 is 15215646521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12564651251 is a prime.

It is a super-2 number, since 2×12564651251² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12564651221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282325625 + 6282325626.

It is an arithmetic number, because the mean of its divisors is an integer number (6282325626).

Almost surely, 2^12564651251 is an apocalyptic number.

12564651251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564651251 is an equidigital number, since it uses as much as digits as its factorization.

12564651251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 38.

The spelling of 12564651251 in words is "twelve billion, five hundred sixty-four million, six hundred fifty-one thousand, two hundred fifty-one".