63980556831 has 16 divisors (see below), whose sum is σ = 95154837600. Its totient is φ = 42487732224.

The previous prime is 63980556811. The next prime is 63980556863. The reversal of 63980556831 is 13865508936.

63980556831 is a `hidden beast` number, since 6 + 3 + 9 + 8 + 0 + 556 + 83 + 1 = 666.

It is not a de Polignac number, because 63980556831 - 2²⁶ = 63913447967 is a prime.

It is a super-2 number, since 2×63980556831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63980556811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4603276 + ... + 4617153.

It is an arithmetic number, because the mean of its divisors is an integer number (5947177350).

Almost surely, 2^63980556831 is an apocalyptic number.

63980556831 is a deficient number, since it is larger than the sum of its proper divisors (31174280769).

63980556831 is a wasteful number, since it uses less digits than its factorization.

63980556831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220695 (or 9220689 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 63980556831 in words is "sixty-three billion, nine hundred eighty million, five hundred fifty-six thousand, eight hundred thirty-one".