631944674045 has 32 divisors (see below), whose sum is σ = 783734691168. Its totient is φ = 488799940608.

The previous prime is 631944674029. The next prime is 631944674047. The reversal of 631944674045 is 540476449136.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 75043671481 + 556901002564 = 273941^2 + 746258^2 .

It is a cyclic number.

It is not a de Polignac number, because 631944674045 - 2⁴ = 631944674029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631944674047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31223249 + ... + 31243481.

It is an arithmetic number, because the mean of its divisors is an integer number (24491709099).

Almost surely, 2^631944674045 is an apocalyptic number.

It is an amenable number.

631944674045 is a deficient number, since it is larger than the sum of its proper divisors (151790017123).

631944674045 is a wasteful number, since it uses less digits than its factorization.

631944674045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21329.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 631944674045 in words is "six hundred thirty-one billion, nine hundred forty-four million, six hundred seventy-four thousand, forty-five".