64340836625 has 32 divisors (see below), whose sum is σ = 86884377216. Its totient is φ = 47287800000.

The previous prime is 64340836619. The next prime is 64340836633. The reversal of 64340836625 is 52663804346.

It is not a de Polignac number, because 64340836625 - 2²⁶ = 64273727761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64340836625.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249050 + ... + 436700.

It is an arithmetic number, because the mean of its divisors is an integer number (2715136788).

Almost surely, 2^64340836625 is an apocalyptic number.

64340836625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64340836625 is a deficient number, since it is larger than the sum of its proper divisors (22543540591).

64340836625 is a wasteful number, since it uses less digits than its factorization.

64340836625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187890 (or 187880 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 64340836625 in words is "sixty-four billion, three hundred forty million, eight hundred thirty-six thousand, six hundred twenty-five".