63518055864 has 32 divisors (see below), whose sum is σ = 163917565440. Its totient is φ = 20489695200.

The previous prime is 63518055863. The next prime is 63518055877. The reversal of 63518055864 is 46855081536.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63518055863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42686122 + ... + 42687609.

It is an arithmetic number, because the mean of its divisors is an integer number (5122423920).

Almost surely, 2^63518055864 is an apocalyptic number.

It is an amenable number.

63518055864 is an abundant number, since it is smaller than the sum of its proper divisors (100399509576).

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

63518055864 is a wasteful number, since it uses less digits than its factorization.

63518055864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85373771 (or 85373767 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 63518055864 in words is "sixty-three billion, five hundred eighteen million, fifty-five thousand, eight hundred sixty-four".