63486865156 has 81 divisors (see below), whose sum is σ = 132387147039. Its totient is φ = 26607609600.

The previous prime is 63486865153. The next prime is 63486865157. The reversal of 63486865156 is 65156868436.

The square root of 63486865156 is 251966.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 29107772100 + 34379093056 = 170610^2 + 185416^2 .

It is a super-2 number, since 2×63486865156² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63486865156.

It is not an unprimeable number, because it can be changed into a prime (63486865153) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 72061836 + ... + 72062716.

Almost surely, 2^63486865156 is an apocalyptic number.

63486865156 is the 251966-th square number.

It is an amenable number.

63486865156 is an abundant number, since it is smaller than the sum of its proper divisors (68900281883).

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

63486865156 is a wasteful number, since it uses less digits than its factorization.

63486865156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 907 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 58.

The spelling of 63486865156 in words is "sixty-three billion, four hundred eighty-six million, eight hundred sixty-five thousand, one hundred fifty-six".