63722816 has 14 divisors (see below), whose sum is σ = 126450090. Its totient is φ = 31861376.

The previous prime is 63722803. The next prime is 63722821. The reversal of 63722816 is 61822736.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59228416 + 4494400 = 7696^2 + 2120^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497771 + ... + 497898.

Almost surely, 2^63722816 is an apocalyptic number.

It is an amenable number.

63722816 is a deficient number, since it is larger than the sum of its proper divisors (62727274).

63722816 is an equidigital number, since it uses as much as digits as its factorization.

63722816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995681 (or 995671 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 63722816 is about 7982.6572017092. The cubic root of 63722816 is about 399.4216976522.

The spelling of 63722816 in words is "sixty-three million, seven hundred twenty-two thousand, eight hundred sixteen".