31665494768964 has 96 divisors (see below), whose sum is σ = 85030493184000. Its totient is φ = 8984349480960.

The previous prime is 31665494768879. The next prime is 31665494768969. The reversal of 31665494768964 is 46986749456613.

It is a self number, because there is not a number n which added to its sum of digits gives 31665494768964.

It is not an unprimeable number, because it can be changed into a prime (31665494768969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5968557 + ... + 9947595.

It is an arithmetic number, because the mean of its divisors is an integer number (885734304000).

Almost surely, 2^{31665494768964} 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 31665494768964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42515246592000).

31665494768964 is an abundant number, since it is smaller than the sum of its proper divisors (53364998415036).

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

31665494768964 is a wasteful number, since it uses less digits than its factorization.

31665494768964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979713 (or 3979711 counting only the distinct ones).

The product of its digits is 5643509760, while the sum is 78.

The spelling of 31665494768964 in words is "thirty-one trillion, six hundred sixty-five billion, four hundred ninety-four million, seven hundred sixty-eight thousand, nine hundred sixty-four".