63978887936 has 36 divisors (see below), whose sum is σ = 128972344704. Its totient is φ = 31672704000.

The previous prime is 63978887899. The next prime is 63978887941.

63978887936 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211360 + ... + 1263071.

Almost surely, 2^63978887936 is an apocalyptic number.

It is an amenable number.

63978887936 is an abundant number, since it is smaller than the sum of its proper divisors (64993456768).

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

63978887936 is a wasteful number, since it uses less digits than its factorization.

63978887936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474548 (or 2474534 counting only the distinct ones).

The product of its digits is 658409472, while the sum is 74.

The spelling of 63978887936 in words is "sixty-three billion, nine hundred seventy-eight million, eight hundred eighty-seven thousand, nine hundred thirty-six".