31615426489 has 2 divisors, whose sum is σ = 31615426490. Its totient is φ = 31615426488.

The previous prime is 31615426481. The next prime is 31615426529. The reversal of 31615426489 is 98462451613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19577606400 + 12037820089 = 139920^2 + 109717^2 .

It is a cyclic number.

It is not a de Polignac number, because 31615426489 - 2³ = 31615426481 is a prime.

It is not a weakly prime, because it can be changed into another prime (31615426481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15807713244 + 15807713245.

It is an arithmetic number, because the mean of its divisors is an integer number (15807713245).

Almost surely, 2^31615426489 is an apocalyptic number.

It is an amenable number.

31615426489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31615426489 is an equidigital number, since it uses as much as digits as its factorization.

31615426489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The spelling of 31615426489 in words is "thirty-one billion, six hundred fifteen million, four hundred twenty-six thousand, four hundred eighty-nine".