15680648579 has 2 divisors, whose sum is σ = 15680648580. Its totient is φ = 15680648578.

The previous prime is 15680648561. The next prime is 15680648611. The reversal of 15680648579 is 97584608651.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15680648579 is a prime.

It is not a weakly prime, because it can be changed into another prime (15680648539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7840324289 + 7840324290.

It is an arithmetic number, because the mean of its divisors is an integer number (7840324290).

Almost surely, 2^15680648579 is an apocalyptic number.

15680648579 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680648579 is an equidigital number, since it uses as much as digits as its factorization.

15680648579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 15680648579 in words is "fifteen billion, six hundred eighty million, six hundred forty-eight thousand, five hundred seventy-nine".