64611256 has 16 divisors (see below), whose sum is σ = 122680800. Its totient is φ = 31896384.

The previous prime is 64611251. The next prime is 64611259. The reversal of 64611256 is 65211646.

It is a super-2 number, since 2×64611256² = 8349228803795072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64611251) 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, 50485 + ... + 51748.

It is an arithmetic number, because the mean of its divisors is an integer number (7667550).

Almost surely, 2^64611256 is an apocalyptic number.

It is an amenable number.

64611256 is a deficient number, since it is larger than the sum of its proper divisors (58069544).

64611256 is a wasteful number, since it uses less digits than its factorization.

64611256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102318 (or 102314 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 64611256 is about 8038.1127138154. The cubic root of 64611256 is about 401.2694171884.

The spelling of 64611256 in words is "sixty-four million, six hundred eleven thousand, two hundred fifty-six".