64009257 has 24 divisors (see below), whose sum is σ = 93040128. Its totient is φ = 39124800.

The previous prime is 64009243. The next prime is 64009259. The reversal of 64009257 is 75290046.

It is not a de Polignac number, because 64009257 - 2⁷ = 64009129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64009259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96507 + ... + 97167.

It is an arithmetic number, because the mean of its divisors is an integer number (3876672).

Almost surely, 2^64009257 is an apocalyptic number.

It is an amenable number.

64009257 is a deficient number, since it is larger than the sum of its proper divisors (29030871).

64009257 is a wasteful number, since it uses less digits than its factorization.

64009257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 64009257 is about 8000.5785415806. The cubic root of 64009257 is about 400.0192844869.

The spelling of 64009257 in words is "sixty-four million, nine thousand, two hundred fifty-seven".