64653684 has 12 divisors (see below), whose sum is σ = 150858624. Its totient is φ = 21551224.

The previous prime is 64653683. The next prime is 64653709. The reversal of 64653684 is 48635646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64653683) 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, 2693892 + ... + 2693915.

It is an arithmetic number, because the mean of its divisors is an integer number (12571552).

Almost surely, 2^64653684 is an apocalyptic number.

It is an amenable number.

64653684 is an abundant number, since it is smaller than the sum of its proper divisors (86204940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64653684 is a wasteful number, since it uses less digits than its factorization.

64653684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387814 (or 5387812 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 64653684 is about 8040.7514574199. The cubic root of 64653684 is about 401.3572312663.

The spelling of 64653684 in words is "sixty-four million, six hundred fifty-three thousand, six hundred eighty-four".