64145625 has 20 divisors (see below), whose sum is σ = 106878288. Its totient is φ = 34210000.

The previous prime is 64145623. The next prime is 64145633. The reversal of 64145625 is 52654146.

It is not a de Polignac number, because 64145625 - 2¹ = 64145623 is a prime.

It is a super-2 number, since 2×64145625² = 8229322413281250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64145621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15231 + ... + 18980.

Almost surely, 2^64145625 is an apocalyptic number.

It is an amenable number.

64145625 is a deficient number, since it is larger than the sum of its proper divisors (42732663).

64145625 is an equidigital number, since it uses as much as digits as its factorization.

64145625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34234 (or 34219 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 64145625 is about 8009.0963909794. The cubic root of 64145625 is about 400.3031556003.

The spelling of 64145625 in words is "sixty-four million, one hundred forty-five thousand, six hundred twenty-five".