63878518564 has 45 divisors (see below), whose sum is σ = 130461468347. Its totient is φ = 27365892792.

The previous prime is 63878518553. The next prime is 63878518577. The reversal of 63878518564 is 46581587836.

The square root of 63878518564 is 252742.

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

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, 24767427 + ... + 24770005.

Almost surely, 2^63878518564 is an apocalyptic number.

63878518564 is the 252742-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63878518564

63878518564 is an abundant number, since it is smaller than the sum of its proper divisors (66582949783).

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

63878518564 is an frugal number, since it uses more digits than its factorization.

63878518564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190 (or 2588 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 61.

The spelling of 63878518564 in words is "sixty-three billion, eight hundred seventy-eight million, five hundred eighteen thousand, five hundred sixty-four".