63900387543800 has 48 divisors (see below), whose sum is σ = 148569210057960. Its totient is φ = 25560015831680.

The previous prime is 63900387543799. The next prime is 63900387543821. The reversal of 63900387543800 is 834578300936.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40967822 + ... + 42498978.

Almost surely, 2^{63900387543800} is an apocalyptic number.

It is an amenable number.

63900387543800 is an abundant number, since it is smaller than the sum of its proper divisors (84668822514160).

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

63900387543800 is a wasteful number, since it uses less digits than its factorization.

63900387543800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739840 (or 1739831 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 63900387543800 in words is "sixty-three trillion, nine hundred billion, three hundred eighty-seven million, five hundred forty-three thousand, eight hundred".