63966503056 has 45 divisors (see below), whose sum is σ = 126423589579. Its totient is φ = 31353490688.

The previous prime is 63966503033. The next prime is 63966503071. The reversal of 63966503056 is 65030566936.

It is a happy number.

The square root of 63966503056 is 252916.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3686432656 + 60280070400 = 60716^2 + 245520^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53617596 + ... + 53618788.

Almost surely, 2^63966503056 is an apocalyptic number.

63966503056 is the 252916-th square number.

It is an amenable number.

63966503056 is a deficient number, since it is larger than the sum of its proper divisors (62457086523).

63966503056 is an frugal number, since it uses more digits than its factorization.

63966503056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 49.

Multiplying 63966503056 by its sum of digits (49), we get a square (3134358649744 = 1770412²).

The spelling of 63966503056 in words is "sixty-three billion, nine hundred sixty-six million, five hundred three thousand, fifty-six".