31610661163 has 2 divisors, whose sum is σ = 31610661164. Its totient is φ = 31610661162.

The previous prime is 31610661151. The next prime is 31610661191. The reversal of 31610661163 is 36116601613.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31610661163 is a prime.

It is not a weakly prime, because it can be changed into another prime (31610661193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805330581 + 15805330582.

It is an arithmetic number, because the mean of its divisors is an integer number (15805330582).

Almost surely, 2^31610661163 is an apocalyptic number.

31610661163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610661163 is an equidigital number, since it uses as much as digits as its factorization.

31610661163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 31610661163 in words is "thirty-one billion, six hundred ten million, six hundred sixty-one thousand, one hundred sixty-three".