64430725 has 12 divisors (see below), whose sum is σ = 81021600. Its totient is φ = 50817200.

The previous prime is 64430719. The next prime is 64430777. The reversal of 64430725 is 52703446.

64430725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64430725 - 2²¹ = 62333573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16375 + ... + 19924.

It is an arithmetic number, because the mean of its divisors is an integer number (6751800).

Almost surely, 2^64430725 is an apocalyptic number.

It is an amenable number.

64430725 is a deficient number, since it is larger than the sum of its proper divisors (16590875).

64430725 is a wasteful number, since it uses less digits than its factorization.

64430725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36380 (or 36375 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 64430725 is about 8026.8751703262. The cubic root of 64430725 is about 400.8953381786.

The spelling of 64430725 in words is "sixty-four million, four hundred thirty thousand, seven hundred twenty-five".