64445925 has 12 divisors (see below), whose sum is σ = 106550720. Its totient is φ = 34371120.

The previous prime is 64445921. The next prime is 64445939. The reversal of 64445925 is 52954446.

It is a happy number.

It is not a de Polignac number, because 64445925 - 2² = 64445921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429565 + ... + 429714.

Almost surely, 2^64445925 is an apocalyptic number.

It is an amenable number.

64445925 is a deficient number, since it is larger than the sum of its proper divisors (42104795).

64445925 is a wasteful number, since it uses less digits than its factorization.

64445925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859292 (or 859287 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 64445925 is about 8027.8219337502. The cubic root of 64445925 is about 400.9268610792.

The spelling of 64445925 in words is "sixty-four million, four hundred forty-five thousand, nine hundred twenty-five".