31368617289 has 12 divisors (see below), whose sum is σ = 45312808372. Its totient is φ = 20911219200.

The previous prime is 31368617263. The next prime is 31368617327. The reversal of 31368617289 is 98271686313.

31368617289 is a `hidden beast` number, since 3 + 13 + 6 + 8 + 617 + 2 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17294354064 + 14074263225 = 131508^2 + 118635^2 .

It is not a de Polignac number, because 31368617289 - 2¹⁵ = 31368584521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31368617219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85329 + ... + 264609.

Almost surely, 2^31368617289 is an apocalyptic number.

It is an amenable number.

31368617289 is a deficient number, since it is larger than the sum of its proper divisors (13944191083).

31368617289 is a wasteful number, since it uses less digits than its factorization.

31368617289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198728 (or 198725 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 31368617289 in words is "thirty-one billion, three hundred sixty-eight million, six hundred seventeen thousand, two hundred eighty-nine".