63987036894 has 24 divisors (see below), whose sum is σ = 151242087672. Its totient is φ = 19390011120.

The previous prime is 63987036847. The next prime is 63987036929. The reversal of 63987036894 is 49863078936.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 161583229 + ... + 161583624.

It is an arithmetic number, because the mean of its divisors is an integer number (6301753653).

Almost surely, 2^63987036894 is an apocalyptic number.

63987036894 is an abundant number, since it is smaller than the sum of its proper divisors (87255050778).

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

63987036894 is a wasteful number, since it uses less digits than its factorization.

63987036894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323166872 (or 323166869 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 63987036894 in words is "sixty-three billion, nine hundred eighty-seven million, thirty-six thousand, eight hundred ninety-four".