64288725 has 24 divisors (see below), whose sum is σ = 107796672. Its totient is φ = 33801600.

The previous prime is 64288709. The next prime is 64288733. The reversal of 64288725 is 52788246.

It is a happy number.

It is not a de Polignac number, because 64288725 - 2⁴ = 64288709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 712 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (4491528).

Almost surely, 2^64288725 is an apocalyptic number.

It is an amenable number.

64288725 is a deficient number, since it is larger than the sum of its proper divisors (43507947).

64288725 is a wasteful number, since it uses less digits than its factorization.

64288725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157 (or 12152 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 64288725 is about 8018.0250061970. The cubic root of 64288725 is about 400.6006081400.

The spelling of 64288725 in words is "sixty-four million, two hundred eighty-eight thousand, seven hundred twenty-five".