64565256 has 32 divisors (see below), whose sum is σ = 184472640. Its totient is φ = 18447168.

The previous prime is 64565251. The next prime is 64565261. The reversal of 64565256 is 65256546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64565251) and next prime (64565261).

It is not an unprimeable number, because it can be changed into a prime (64565251) 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, 191991 + ... + 192326.

It is an arithmetic number, because the mean of its divisors is an integer number (5764770).

Almost surely, 2^64565256 is an apocalyptic number.

It is an amenable number.

64565256 is an abundant number, since it is smaller than the sum of its proper divisors (119907384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64565256 is a wasteful number, since it uses less digits than its factorization.

64565256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384333 (or 384329 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

The square root of 64565256 is about 8035.2508361594. The cubic root of 64565256 is about 401.1741666260.

The spelling of 64565256 in words is "sixty-four million, five hundred sixty-five thousand, two hundred fifty-six".