631132231136 has 144 divisors (see below), whose sum is σ = 1421676023040. Its totient is φ = 273469647360.

The previous prime is 631132231117. The next prime is 631132231151.

631132231136 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 23 ways as a sum of consecutive naturals, for example, 23373035 + ... + 23400021.

It is an arithmetic number, because the mean of its divisors is an integer number (9872750160).

Almost surely, 2^631132231136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631132231136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710838011520).

631132231136 is an abundant number, since it is smaller than the sum of its proper divisors (790543791904).

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

631132231136 is a wasteful number, since it uses less digits than its factorization.

631132231136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27145 (or 27108 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

It can be divided in two parts, 631132 and 231136, that added together give a palindrome (862268).

The spelling of 631132231136 in words is "six hundred thirty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred thirty-six".