64325639 has 4 divisors (see below), whose sum is σ = 73515024. Its totient is φ = 55136256.

The previous prime is 64325609. The next prime is 64325669. The reversal of 64325639 is 93652346.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64325609) and next prime (64325669).

It is not a de Polignac number, because 64325639 - 2⁸ = 64325383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64325609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4594682 + ... + 4594695.

It is an arithmetic number, because the mean of its divisors is an integer number (18378756).

Almost surely, 2^64325639 is an apocalyptic number.

64325639 is a deficient number, since it is larger than the sum of its proper divisors (9189385).

64325639 is an equidigital number, since it uses as much as digits as its factorization.

64325639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189384.

The product of its digits is 116640, while the sum is 38.

The square root of 64325639 is about 8020.3266142970. The cubic root of 64325639 is about 400.6772672090.

The spelling of 64325639 in words is "sixty-four million, three hundred twenty-five thousand, six hundred thirty-nine".