31916409590489 has 2 divisors, whose sum is σ = 31916409590490. Its totient is φ = 31916409590488.

The previous prime is 31916409590477. The next prime is 31916409590491. The reversal of 31916409590489 is 98409590461913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29349739651600 + 2566669938889 = 5417540^2 + 1602083^2 .

It is an emirp because it is prime and its reverse (98409590461913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31916409590489 - 2³⁶ = 31847690113753 is a prime.

It is a super-2 number, since 2×31916409590489² (a number of 28 digits) contains 22 as substring.

Together with 31916409590491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31916409590789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15958204795244 + 15958204795245.

It is an arithmetic number, because the mean of its divisors is an integer number (15958204795245).

Almost surely, 2^{31916409590489} is an apocalyptic number.

It is an amenable number.

31916409590489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31916409590489 is an equidigital number, since it uses as much as digits as its factorization.

31916409590489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75582720, while the sum is 68.

The spelling of 31916409590489 in words is "thirty-one trillion, nine hundred sixteen billion, four hundred nine million, five hundred ninety thousand, four hundred eighty-nine".