64888257 has 16 divisors (see below), whose sum is σ = 99512192. Its totient is φ = 36840960.

The previous prime is 64888253. The next prime is 64888273. The reversal of 64888257 is 75288846.

It is not a de Polignac number, because 64888257 - 2² = 64888253 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64888253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6544 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (6219512).

Almost surely, 2^64888257 is an apocalyptic number.

It is an amenable number.

64888257 is a deficient number, since it is larger than the sum of its proper divisors (34623935).

64888257 is a wasteful number, since it uses less digits than its factorization.

64888257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19848.

The product of its digits is 860160, while the sum is 48.

The square root of 64888257 is about 8055.3247606785. The cubic root of 64888257 is about 401.8420396204.

The spelling of 64888257 in words is "sixty-four million, eight hundred eighty-eight thousand, two hundred fifty-seven".