64445425 has 36 divisors (see below), whose sum is σ = 91337904. Its totient is φ = 44730400.

The previous prime is 64445411. The next prime is 64445431. The reversal of 64445425 is 52454446.

It is not a de Polignac number, because 64445425 - 2⁵ = 64445393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 145254 + ... + 145696.

It is an arithmetic number, because the mean of its divisors is an integer number (2537164).

Almost surely, 2^64445425 is an apocalyptic number.

It is an amenable number.

64445425 is a deficient number, since it is larger than the sum of its proper divisors (26892479).

64445425 is a wasteful number, since it uses less digits than its factorization.

64445425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 482 counting only the distinct ones).

The product of its digits is 76800, while the sum is 34.

The square root of 64445425 is about 8027.7907919925. The cubic root of 64445425 is about 400.9258242205.

The spelling of 64445425 in words is "sixty-four million, four hundred forty-five thousand, four hundred twenty-five".