64166512564 has 24 divisors (see below), whose sum is σ = 139999664448. Its totient is φ = 24999939840.

The previous prime is 64166512547. The next prime is 64166512591. The reversal of 64166512564 is 46521566146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104166109 + ... + 104166724.

It is an arithmetic number, because the mean of its divisors is an integer number (5833319352).

Almost surely, 2^64166512564 is an apocalyptic number.

It is an amenable number.

64166512564 is an abundant number, since it is smaller than the sum of its proper divisors (75833151884).

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

64166512564 is a wasteful number, since it uses less digits than its factorization.

64166512564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208332855 (or 208332853 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The spelling of 64166512564 in words is "sixty-four billion, one hundred sixty-six million, five hundred twelve thousand, five hundred sixty-four".