31610845489 has 2 divisors, whose sum is σ = 31610845490. Its totient is φ = 31610845488.

The previous prime is 31610845481. The next prime is 31610845531. The reversal of 31610845489 is 98454801613.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18011787264 + 13599058225 = 134208^2 + 116615^2 .

It is a cyclic number.

It is not a de Polignac number, because 31610845489 - 2³ = 31610845481 is a prime.

It is not a weakly prime, because it can be changed into another prime (31610845481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805422744 + 15805422745.

It is an arithmetic number, because the mean of its divisors is an integer number (15805422745).

Almost surely, 2^31610845489 is an apocalyptic number.

It is an amenable number.

31610845489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610845489 is an equidigital number, since it uses as much as digits as its factorization.

31610845489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 31610845489 in words is "thirty-one billion, six hundred ten million, eight hundred forty-five thousand, four hundred eighty-nine".