63937673881 has 9 divisors (see below), whose sum is σ = 64231063519. Its totient is φ = 63645621736.

The previous prime is 63937673827. The next prime is 63937673887. The reversal of 63937673881 is 18837673936.

The square root of 63937673881 is 252859.

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

It can be written as a sum of positive squares in only one way, i.e., 60493862025 + 3443811856 = 245955^2 + 58684^2 .

It is not a de Polignac number, because 63937673881 - 2¹⁵ = 63937641113 is a prime.

It is a super-2 number, since 2×63937673881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63937673887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74087256 + ... + 74088118.

Almost surely, 2^63937673881 is an apocalyptic number.

63937673881 is the 252859-th square number.

63937673881 is the 126430-th centered octagonal number.

It is an amenable number.

63937673881 is a deficient number, since it is larger than the sum of its proper divisors (293389638).

63937673881 is an frugal number, since it uses more digits than its factorization.

63937673881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 1156 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 61.

The spelling of 63937673881 in words is "sixty-three billion, nine hundred thirty-seven million, six hundred seventy-three thousand, eight hundred eighty-one".