63995719986 has 48 divisors (see below), whose sum is σ = 151282748448. Its totient is φ = 19390060800.

The previous prime is 63995719969. The next prime is 63995720021. The reversal of 63995719986 is 68991759936.

63995719986 is a `hidden beast` number, since 6 + 399 + 5 + 71 + 99 + 86 = 666.

63995719986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1903341 + ... + 1936671.

It is an arithmetic number, because the mean of its divisors is an integer number (3151723926).

Almost surely, 2^63995719986 is an apocalyptic number.

63995719986 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

63995719986 is an abundant number, since it is smaller than the sum of its proper divisors (87287028462).

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

63995719986 is a wasteful number, since it uses less digits than its factorization.

63995719986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43047 (or 43044 counting only the distinct ones).

The product of its digits is 198404640, while the sum is 72.

The spelling of 63995719986 in words is "sixty-three billion, nine hundred ninety-five million, seven hundred nineteen thousand, nine hundred eighty-six".