63977144868 has 96 divisors (see below), whose sum is σ = 204143627520. Its totient is φ = 16873090560.

The previous prime is 63977144867. The next prime is 63977144923. The reversal of 63977144868 is 86844177936.

63977144868 is a `hidden beast` number, since 63 + 9 + 7 + 71 + 448 + 68 = 666.

It is a super-2 number, since 2×63977144868² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (63977144863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3245013 + ... + 3264668.

It is an arithmetic number, because the mean of its divisors is an integer number (2126496120).

Almost surely, 2^63977144868 is an apocalyptic number.

It is an amenable number.

63977144868 is an abundant number, since it is smaller than the sum of its proper divisors (140166482652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63977144868 is a wasteful number, since it uses less digits than its factorization.

63977144868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509714 (or 6509706 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 63977144868 in words is "sixty-three billion, nine hundred seventy-seven million, one hundred forty-four thousand, eight hundred sixty-eight".