63315664 has 10 divisors (see below), whose sum is σ = 122674130. Its totient is φ = 31657824.

The previous prime is 63315643. The next prime is 63315677. The reversal of 63315664 is 46651336.

63315664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44997264 + 18318400 = 6708^2 + 4280^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1978599 + ... + 1978630.

It is an arithmetic number, because the mean of its divisors is an integer number (12267413).

Almost surely, 2^63315664 is an apocalyptic number.

It is an amenable number.

63315664 is a deficient number, since it is larger than the sum of its proper divisors (59358466).

63315664 is a wasteful number, since it uses less digits than its factorization.

63315664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957237 (or 3957231 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 63315664 is about 7957.1140497042. The cubic root of 63315664 is about 398.5691880454.

The spelling of 63315664 in words is "sixty-three million, three hundred fifteen thousand, six hundred sixty-four".