64255664 has 20 divisors (see below), whose sum is σ = 135813480. Its totient is φ = 29207040.

The previous prime is 64255657. The next prime is 64255673. The reversal of 64255664 is 46655246.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182369 + ... + 182720.

It is an arithmetic number, because the mean of its divisors is an integer number (6790674).

Almost surely, 2^64255664 is an apocalyptic number.

It is an amenable number.

64255664 is an abundant number, since it is smaller than the sum of its proper divisors (71557816).

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

64255664 is a wasteful number, since it uses less digits than its factorization.

64255664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365108 (or 365102 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 64255664 is about 8015.9630737672. The cubic root of 64255664 is about 400.5319256575.

The spelling of 64255664 in words is "sixty-four million, two hundred fifty-five thousand, six hundred sixty-four".