31961440368026 has 16 divisors (see below), whose sum is σ = 51855477664200. Its totient is φ = 14687017270848.

The previous prime is 31961440367999. The next prime is 31961440368043. The reversal of 31961440368026 is 62086304416913.

It is a Cunningham number, because it is equal to 5653445²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 29767335843025 + 2194104525001 = 5455945^2 + 1481251^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2684024981 + ... + 2684036888.

Almost surely, 2^{31961440368026} is an apocalyptic number.

31961440368026 is a deficient number, since it is larger than the sum of its proper divisors (19894037296174).

31961440368026 is a wasteful number, since it uses less digits than its factorization.

31961440368026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368062113.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 31961440368026 in words is "thirty-one trillion, nine hundred sixty-one billion, four hundred forty million, three hundred sixty-eight thousand, twenty-six".