64570625 has 20 divisors (see below), whose sum is σ = 92220480. Its totient is φ = 44274000.

The previous prime is 64570601. The next prime is 64570633. The reversal of 64570625 is 52607546.

It is not a de Polignac number, because 64570625 - 2²² = 60376321 is a prime.

It is a super-2 number, since 2×64570625² = 8338731225781250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3005 + ... + 11754.

It is an arithmetic number, because the mean of its divisors is an integer number (4611024).

Almost surely, 2^64570625 is an apocalyptic number.

It is an amenable number.

64570625 is a deficient number, since it is larger than the sum of its proper divisors (27649855).

64570625 is an equidigital number, since it uses as much as digits as its factorization.

64570625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14786 (or 14771 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 64570625 is about 8035.5849195936. The cubic root of 64570625 is about 401.1852863548.

The spelling of 64570625 in words is "sixty-four million, five hundred seventy thousand, six hundred twenty-five".