631732473856 has 117 divisors (see below), whose sum is σ = 1389828754713. Its totient is φ = 286896783360.

The previous prime is 631732473731. The next prime is 631732473857. The reversal of 631732473856 is 658374237136.

The square root of 631732473856 is 794816.

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

It can be written as a sum of positive squares in only one way, i.e., 53645971456 + 578086502400 = 231616^2 + 760320^2 .

It is a Duffinian number.

Its product of digits (15240960) is a multiple of the sum of its prime factors (2304).

It is a junction number, because it is equal to n+sod(n) for n = 631732473797 and 631732473806.

It is not an unprimeable number, because it can be changed into a prime (631732473857) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 559549900 + ... + 559551028.

Almost surely, 2^631732473856 is an apocalyptic number.

631732473856 is the 794816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631732473856

631732473856 is an abundant number, since it is smaller than the sum of its proper divisors (758096280857).

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

631732473856 is an frugal number, since it uses more digits than its factorization.

631732473856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 1142 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 55.

The spelling of 631732473856 in words is "six hundred thirty-one billion, seven hundred thirty-two million, four hundred seventy-three thousand, eight hundred fifty-six".