63615664 has 20 divisors (see below), whose sum is σ = 140863504. Its totient is φ = 27263808.

The previous prime is 63615661. The next prime is 63615701. The reversal of 63615664 is 46651636.

63615664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63615661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283887 + ... + 284110.

Almost surely, 2^63615664 is an apocalyptic number.

It is an amenable number.

63615664 is an abundant number, since it is smaller than the sum of its proper divisors (77247840).

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

63615664 is a wasteful number, since it uses less digits than its factorization.

63615664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568012 (or 568006 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 63615664 is about 7975.9428282806. The cubic root of 63615664 is about 399.1976918299.

The spelling of 63615664 in words is "sixty-three million, six hundred fifteen thousand, six hundred sixty-four".