64375257 has 8 divisors (see below), whose sum is σ = 87829984. Its totient is φ = 41918688.

The previous prime is 64375247. The next prime is 64375261. The reversal of 64375257 is 75257346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64375257 - 2⁶ = 64375193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64375217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249388 + ... + 249645.

It is an arithmetic number, because the mean of its divisors is an integer number (10978748).

Almost surely, 2^64375257 is an apocalyptic number.

It is an amenable number.

64375257 is a deficient number, since it is larger than the sum of its proper divisors (23454727).

64375257 is a wasteful number, since it uses less digits than its factorization.

64375257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499079.

The product of its digits is 176400, while the sum is 39.

The square root of 64375257 is about 8023.4192835723. The cubic root of 64375257 is about 400.7802624035.

The spelling of 64375257 in words is "sixty-four million, three hundred seventy-five thousand, two hundred fifty-seven".