64615256 has 16 divisors (see below), whose sum is σ = 121506000. Its totient is φ = 32213664.

The previous prime is 64615237. The next prime is 64615259. The reversal of 64615256 is 65251646.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64615259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8780 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (7594125).

Almost surely, 2^64615256 is an apocalyptic number.

It is an amenable number.

64615256 is a deficient number, since it is larger than the sum of its proper divisors (56890744).

64615256 is a wasteful number, since it uses less digits than its factorization.

64615256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23498 (or 23494 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 64615256 is about 8038.3615245894. The cubic root of 64615256 is about 401.2776977092.

The spelling of 64615256 in words is "sixty-four million, six hundred fifteen thousand, two hundred fifty-six".