63990832464 has 80 divisors (see below), whose sum is σ = 197806436800. Its totient is φ = 19689485184.

The previous prime is 63990832453. The next prime is 63990832511. The reversal of 63990832464 is 46423809936.

63990832464 is a `hidden beast` number, since 6 + 399 + 0 + 8 + 3 + 246 + 4 = 666.

63990832464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63990832464² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 63990832464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5691574 + ... + 5702805.

It is an arithmetic number, because the mean of its divisors is an integer number (2472580460).

Almost surely, 2^63990832464 is an apocalyptic number.

It is an amenable number.

63990832464 is an abundant number, since it is smaller than the sum of its proper divisors (133815604336).

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

63990832464 is a wasteful number, since it uses less digits than its factorization.

63990832464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394409 (or 11394397 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 63990832464 in words is "sixty-three billion, nine hundred ninety million, eight hundred thirty-two thousand, four hundred sixty-four".