15680231617 has 2 divisors, whose sum is σ = 15680231618. Its totient is φ = 15680231616.

The previous prime is 15680231579. The next prime is 15680231629. The reversal of 15680231617 is 71613208651.

It is a happy number.

15680231617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15656015376 + 24216241 = 125124^2 + 4921^2 .

It is a cyclic number.

It is not a de Polignac number, because 15680231617 - 2¹¹ = 15680229569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15680231617.

It is not a weakly prime, because it can be changed into another prime (15687231617) 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, 7840115808 + 7840115809.

It is an arithmetic number, because the mean of its divisors is an integer number (7840115809).

Almost surely, 2^15680231617 is an apocalyptic number.

It is an amenable number.

15680231617 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680231617 is an equidigital number, since it uses as much as digits as its factorization.

15680231617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 15680231617 in words is "fifteen billion, six hundred eighty million, two hundred thirty-one thousand, six hundred seventeen".