31660941311 has 16 divisors (see below), whose sum is σ = 32316624000. Its totient is φ = 31012171008.

The previous prime is 31660941217. The next prime is 31660941343. The reversal of 31660941311 is 11314906613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31660941311 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 (31660941211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16866905 + ... + 16868781.

It is an arithmetic number, because the mean of its divisors is an integer number (2019789000).

Almost surely, 2^31660941311 is an apocalyptic number.

31660941311 is a deficient number, since it is larger than the sum of its proper divisors (655682689).

31660941311 is a wasteful number, since it uses less digits than its factorization.

31660941311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 31660941311 in words is "thirty-one billion, six hundred sixty million, nine hundred forty-one thousand, three hundred eleven".