63945259876 has 27 divisors (see below), whose sum is σ = 113886176691. Its totient is φ = 31416054264.

The previous prime is 63945259843. The next prime is 63945259877. The reversal of 63945259876 is 67895254936.

The square root of 63945259876 is 252874.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63945259877) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29838061 + ... + 29840203.

Almost surely, 2^63945259876 is an apocalyptic number.

63945259876 is the 252874-th square number.

It is an amenable number.

63945259876 is a deficient number, since it is larger than the sum of its proper divisors (49940916815).

63945259876 is an frugal number, since it uses more digits than its factorization.

63945259876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4408 (or 2204 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 64.

Multiplying 63945259876 by its sum of digits (64), we get a square (4092496632064 = 2022992²).

The spelling of 63945259876 in words is "sixty-three billion, nine hundred forty-five million, two hundred fifty-nine thousand, eight hundred seventy-six".