63449579664 has 75 divisors (see below), whose sum is σ = 183667741257. Its totient is φ = 21146837184.

The previous prime is 63449579591. The next prime is 63449579729. The reversal of 63449579664 is 46697594436.

The square root of 63449579664 is 251892.

It is a perfect power (a square), and thus also a powerful number.

63449579664 is a `hidden beast` number, since 63 + 449 + 5 + 79 + 6 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20272064400 + 43177515264 = 142380^2 + 207792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9064614 + ... + 9071610.

Almost surely, 2^63449579664 is an apocalyptic number.

63449579664 is the 251892-nd square number.

It is an amenable number.

63449579664 is an abundant number, since it is smaller than the sum of its proper divisors (120218161593).

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

63449579664 is an frugal number, since it uses more digits than its factorization.

63449579664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14014 (or 7002 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 63.

The spelling of 63449579664 in words is "sixty-three billion, four hundred forty-nine million, five hundred seventy-nine thousand, six hundred sixty-four".