64623648 has 48 divisors (see below), whose sum is σ = 170069760. Its totient is φ = 21486336.

The previous prime is 64623641. The next prime is 64623661. The reversal of 64623648 is 84632646.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64623641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57718 + ... + 58826.

It is an arithmetic number, because the mean of its divisors is an integer number (3543120).

Almost surely, 2^64623648 is an apocalyptic number.

It is an amenable number.

64623648 is an abundant number, since it is smaller than the sum of its proper divisors (105446112).

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

64623648 is a wasteful number, since it uses less digits than its factorization.

64623648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1721 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 64623648 is about 8038.8835045670. The cubic root of 64623648 is about 401.2950691313.

The spelling of 64623648 in words is "sixty-four million, six hundred twenty-three thousand, six hundred forty-eight".