63712520 has 32 divisors (see below), whose sum is σ = 147231000. Its totient is φ = 24795648.

The previous prime is 63712501. The next prime is 63712547. The reversal of 63712520 is 2521736.

It can be written as a sum of positive squares in 4 ways, for example, as 63712324 + 196 = 7982^2 + 14^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63712520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20045 + ... + 23004.

Almost surely, 2^63712520 is an apocalyptic number.

It is an amenable number.

63712520 is an abundant number, since it is smaller than the sum of its proper divisors (83518480).

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

63712520 is a wasteful number, since it uses less digits than its factorization.

63712520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43097 (or 43093 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 63712520 is about 7982.0122776152. The cubic root of 63712520 is about 399.4001843358.

The spelling of 63712520 in words is "sixty-three million, seven hundred twelve thousand, five hundred twenty".