63172057720 has 16 divisors (see below), whose sum is σ = 142137129960. Its totient is φ = 25268823072.

The previous prime is 63172057709. The next prime is 63172057763. The reversal of 63172057720 is 2775027136.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1579301443 = 63172057720 / (6 + 3 + 1 + 7 + 2 + 0 + 5 + 7 + 7 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789650682 + ... + 789650761.

Almost surely, 2^63172057720 is an apocalyptic number.

It is an amenable number.

63172057720 is an abundant number, since it is smaller than the sum of its proper divisors (78965072240).

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

63172057720 is a wasteful number, since it uses less digits than its factorization.

63172057720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579301454 (or 1579301450 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 63172057720 in words is "sixty-three billion, one hundred seventy-two million, fifty-seven thousand, seven hundred twenty".