31080416720 has 20 divisors (see below), whose sum is σ = 72261969060. Its totient is φ = 12432166656.

The previous prime is 31080416707. The next prime is 31080416723. The reversal of 31080416720 is 2761408013.

It can be written as a sum of positive squares in 2 ways, for example, as 3991206976 + 27089209744 = 63176^2 + 164588^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31080416723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194252525 + ... + 194252684.

It is an arithmetic number, because the mean of its divisors is an integer number (3613098453).

Almost surely, 2^31080416720 is an apocalyptic number.

It is an amenable number.

31080416720 is an abundant number, since it is smaller than the sum of its proper divisors (41181552340).

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

31080416720 is a wasteful number, since it uses less digits than its factorization.

31080416720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388505222 (or 388505216 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 31080416720 in words is "thirty-one billion, eighty million, four hundred sixteen thousand, seven hundred twenty".