12564417859 has 12 divisors (see below), whose sum is σ = 14657891544. Its totient is φ = 10738450464.

The previous prime is 12564417847. The next prime is 12564417871. The reversal of 12564417859 is 95871446521.

It is an interprime number because it is at equal distance from previous prime (12564417847) and next prime (12564417871).

It is not a de Polignac number, because 12564417859 - 2⁷ = 12564417731 is a prime.

It is a super-2 number, since 2×12564417859² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564417839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352474 + ... + 386479.

It is an arithmetic number, because the mean of its divisors is an integer number (1221490962).

Almost surely, 2^12564417859 is an apocalyptic number.

12564417859 is a deficient number, since it is larger than the sum of its proper divisors (2093473685).

12564417859 is an equidigital number, since it uses as much as digits as its factorization.

12564417859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739314 (or 739307 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The spelling of 12564417859 in words is "twelve billion, five hundred sixty-four million, four hundred seventeen thousand, eight hundred fifty-nine".