63967008889 has 9 divisors (see below), whose sum is σ = 74412661701. Its totient is φ = 54827347260.

The previous prime is 63967008857. The next prime is 63967008949. The reversal of 63967008889 is 98880076936.

The square root of 63967008889 is 252917.

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

It is not a de Polignac number, because 63967008889 - 2⁵ = 63967008857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63967008889.

It is not an unprimeable number, because it can be changed into a prime (63967008839) 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, 1752354 + ... + 1788484.

Almost surely, 2^63967008889 is an apocalyptic number.

63967008889 is the 252917-th square number.

63967008889 is the 126459-th centered octagonal number.

It is an amenable number.

63967008889 is a deficient number, since it is larger than the sum of its proper divisors (10445652812).

63967008889 is an frugal number, since it uses more digits than its factorization.

63967008889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72276 (or 36138 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

Multiplying 63967008889 by its sum of digits (64), we get a square (4093888568896 = 2023336²).

The spelling of 63967008889 in words is "sixty-three billion, nine hundred sixty-seven million, eight thousand, eight hundred eighty-nine".