31610456989 has 2 divisors, whose sum is σ = 31610456990. Its totient is φ = 31610456988.

The previous prime is 31610456971. The next prime is 31610457059. The reversal of 31610456989 is 98965401613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31609284100 + 1172889 = 177790^2 + 1083^2 .

It is a cyclic number.

It is not a de Polignac number, because 31610456989 - 2¹⁵ = 31610424221 is a prime.

It is a super-2 number, since 2×31610456989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31610453989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805228494 + 15805228495.

It is an arithmetic number, because the mean of its divisors is an integer number (15805228495).

Almost surely, 2^31610456989 is an apocalyptic number.

It is an amenable number.

31610456989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610456989 is an equidigital number, since it uses as much as digits as its factorization.

31610456989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 31610456989 in words is "thirty-one billion, six hundred ten million, four hundred fifty-six thousand, nine hundred eighty-nine".