64899256 has 8 divisors (see below), whose sum is σ = 121686120. Its totient is φ = 32449624.

The previous prime is 64899253. The next prime is 64899259. The reversal of 64899256 is 65299846.

It is an interprime number because it is at equal distance from previous prime (64899253) and next prime (64899259).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64899253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056196 + ... + 4056211.

It is an arithmetic number, because the mean of its divisors is an integer number (15210765).

Almost surely, 2^64899256 is an apocalyptic number.

It is an amenable number.

64899256 is a deficient number, since it is larger than the sum of its proper divisors (56786864).

64899256 is a wasteful number, since it uses less digits than its factorization.

64899256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112413 (or 8112409 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 64899256 is about 8056.0074478615. The cubic root of 64899256 is about 401.8647433221.

The spelling of 64899256 in words is "sixty-four million, eight hundred ninety-nine thousand, two hundred fifty-six".