31745787764 has 12 divisors (see below), whose sum is σ = 55755690564. Its totient is φ = 15815590464.

The previous prime is 31745787763. The next prime is 31745787851. The reversal of 31745787764 is 46778754713.

It can be written as a sum of positive squares in 2 ways, for example, as 6353365264 + 25392422500 = 79708^2 + 159350^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31745787763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14324609 + ... + 14326824.

It is an arithmetic number, because the mean of its divisors is an integer number (4646307547).

Almost surely, 2^31745787764 is an apocalyptic number.

It is an amenable number.

31745787764 is a deficient number, since it is larger than the sum of its proper divisors (24009902800).

31745787764 is a wasteful number, since it uses less digits than its factorization.

31745787764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28651714 (or 28651712 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 59.

The spelling of 31745787764 in words is "thirty-one billion, seven hundred forty-five million, seven hundred eighty-seven thousand, seven hundred sixty-four".