63787601664 has 54 divisors (see below), whose sum is σ = 183915387656. Its totient is φ = 21262533120.

The previous prime is 63787601663. The next prime is 63787601687. The reversal of 63787601664 is 46610678736.

It is a self number, because there is not a number n which added to its sum of digits gives 63787601664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63787601663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13840492 + ... + 13845099.

Almost surely, 2^63787601664 is an apocalyptic number.

63787601664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63787601664 is an abundant number, since it is smaller than the sum of its proper divisors (120127785992).

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

63787601664 is a wasteful number, since it uses less digits than its factorization.

63787601664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27685613 (or 27685596 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 63787601664 in words is "sixty-three billion, seven hundred eighty-seven million, six hundred one thousand, six hundred sixty-four".