31764334240 has 96 divisors (see below), whose sum is σ = 77138989200. Its totient is φ = 12351504384.

The previous prime is 31764334237. The next prime is 31764334313. The reversal of 31764334240 is 4243346713.

It can be written as a sum of positive squares in 8 ways, for example, as 30439083024 + 1325251216 = 174468^2 + 36404^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 31764334240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11536704 + ... + 11539456.

Almost surely, 2^31764334240 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 31764334240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38569494600).

31764334240 is an abundant number, since it is smaller than the sum of its proper divisors (45374654960).

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

31764334240 is a wasteful number, since it uses less digits than its factorization.

31764334240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754 (or 4746 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 31764334240 in words is "thirty-one billion, seven hundred sixty-four million, three hundred thirty-four thousand, two hundred forty".