63440867763768 has 128 divisors (see below), whose sum is σ = 173113360496640. Its totient is φ = 19214196336000.

The previous prime is 63440867763751. The next prime is 63440867763797. The reversal of 63440867763768 is 86736776804436.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 63440867763768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5078920003 + ... + 5078932493.

It is an arithmetic number, because the mean of its divisors is an integer number (1352448128880).

Almost surely, 2^{63440867763768} is an apocalyptic number.

It is an amenable number.

63440867763768 is an abundant number, since it is smaller than the sum of its proper divisors (109672492732872).

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

63440867763768 is a wasteful number, since it uses less digits than its factorization.

63440867763768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21289 (or 21285 counting only the distinct ones).

The product of its (nonzero) digits is 4096770048, while the sum is 75.

The spelling of 63440867763768 in words is "sixty-three trillion, four hundred forty billion, eight hundred sixty-seven million, seven hundred sixty-three thousand, seven hundred sixty-eight".