64899568 has 20 divisors (see below), whose sum is σ = 126016240. Its totient is φ = 32379264.

The previous prime is 64899563. The next prime is 64899577. The reversal of 64899568 is 86599846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64899563) 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, 3628 + ... + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (6300812).

Almost surely, 2^64899568 is an apocalyptic number.

It is an amenable number.

64899568 is a deficient number, since it is larger than the sum of its proper divisors (61116672).

64899568 is a wasteful number, since it uses less digits than its factorization.

64899568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8824 (or 8818 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The square root of 64899568 is about 8056.0268122692. The cubic root of 64899568 is about 401.8653873028.

The spelling of 64899568 in words is "sixty-four million, eight hundred ninety-nine thousand, five hundred sixty-eight".