631113402263220 has 36 divisors (see below), whose sum is σ = 1914377320198980. Its totient is φ = 168296907270144.

The previous prime is 631113402263207. The next prime is 631113402263303. The reversal of 631113402263220 is 22362204311136.

631113402263220 is a `hidden beast` number, since 6 + 3 + 1 + 1 + 1 + 3 + 402 + 26 + 3 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 297528966944784 + 333584435318436 = 17249028^2 + 18264294^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1753092783885 + ... + 1753092784244.

It is an arithmetic number, because the mean of its divisors is an integer number (53177147783305).

Almost surely, 2^{631113402263220} is an apocalyptic number.

631113402263220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631113402263220 is an abundant number, since it is smaller than the sum of its proper divisors (1283263917935760).

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

631113402263220 is a wasteful number, since it uses less digits than its factorization.

631113402263220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506185568144 (or 3506185568139 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 631113402263220 its reverse (22362204311136), we get a palindrome (653475606574356).

The spelling of 631113402263220 in words is "six hundred thirty-one trillion, one hundred thirteen billion, four hundred two million, two hundred sixty-three thousand, two hundred twenty".