64696257 has 24 divisors (see below), whose sum is σ = 95429568. Its totient is φ = 42228000.

The previous prime is 64696253. The next prime is 64696283. The reversal of 64696257 is 75269646.

It is not a de Polignac number, because 64696257 - 2² = 64696253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64696253) 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, 93282 + ... + 93972.

It is an arithmetic number, because the mean of its divisors is an integer number (3976232).

Almost surely, 2^64696257 is an apocalyptic number.

It is an amenable number.

64696257 is a deficient number, since it is larger than the sum of its proper divisors (30733311).

64696257 is a wasteful number, since it uses less digits than its factorization.

64696257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 898 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 64696257 is about 8043.3983489567. The cubic root of 64696257 is about 401.4453068471.

The spelling of 64696257 in words is "sixty-four million, six hundred ninety-six thousand, two hundred fifty-seven".