64044657 has 12 divisors (see below), whose sum is σ = 92872260. Its totient is φ = 42528768.

The previous prime is 64044653. The next prime is 64044683. The reversal of 64044657 is 75644046.

64044657 is a `hidden beast` number, since 640 + 4 + 4 + 6 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 27029601 = 6084^2 + 5199^2 .

It is not a de Polignac number, because 64044657 - 2² = 64044653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64044653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11532 + ... + 16157.

It is an arithmetic number, because the mean of its divisors is an integer number (7739355).

Almost surely, 2^64044657 is an apocalyptic number.

It is an amenable number.

64044657 is a deficient number, since it is larger than the sum of its proper divisors (28827603).

64044657 is a wasteful number, since it uses less digits than its factorization.

64044657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27952 (or 27949 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 64044657 is about 8002.7905757929. The cubic root of 64044657 is about 400.0930137861.

The spelling of 64044657 in words is "sixty-four million, forty-four thousand, six hundred fifty-seven".