63978687936 has 84 divisors (see below), whose sum is σ = 188339726952. Its totient is φ = 20749837824.

The previous prime is 63978687907. The next prime is 63978687943.

63978687936 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1479690 + ... + 1522313.

Almost surely, 2^63978687936 is an apocalyptic number.

It is an amenable number.

63978687936 is an abundant number, since it is smaller than the sum of its proper divisors (124361039016).

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

63978687936 is a wasteful number, since it uses less digits than its factorization.

63978687936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002058 (or 3002045 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 72.

The spelling of 63978687936 in words is "sixty-three billion, nine hundred seventy-eight million, six hundred eighty-seven thousand, nine hundred thirty-six".