63551816164 has 12 divisors (see below), whose sum is σ = 111218655100. Its totient is φ = 31775057568.

The previous prime is 63551816137. The next prime is 63551816179. The reversal of 63551816164 is 46161815536.

It can be written as a sum of positive squares in 2 ways, for example, as 52271676900 + 11280139264 = 228630^2 + 106208^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26379 + ... + 357490.

Almost surely, 2^63551816164 is an apocalyptic number.

It is an amenable number.

63551816164 is a deficient number, since it is larger than the sum of its proper divisors (47666838936).

63551816164 is a wasteful number, since it uses less digits than its factorization.

63551816164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425262 (or 425260 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The spelling of 63551816164 in words is "sixty-three billion, five hundred fifty-one million, eight hundred sixteen thousand, one hundred sixty-four".