31375362861 has 6 divisors (see below), whose sum is σ = 45319968590. Its totient is φ = 20916908568.

The previous prime is 31375362859. The next prime is 31375362869. The reversal of 31375362861 is 16826357313.

31375362861 is a `hidden beast` number, since 3 + 1 + 37 + 536 + 2 + 86 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30511355625 + 864007236 = 174675^2 + 29394^2 .

It is not a de Polignac number, because 31375362861 - 2¹ = 31375362859 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 (31375362869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1743075706 + ... + 1743075723.

Almost surely, 2^31375362861 is an apocalyptic number.

It is an amenable number.

31375362861 is a deficient number, since it is larger than the sum of its proper divisors (13944605729).

31375362861 is a wasteful number, since it uses less digits than its factorization.

31375362861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486151435 (or 3486151432 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 31375362861 in words is "thirty-one billion, three hundred seventy-five million, three hundred sixty-two thousand, eight hundred sixty-one".