15591502079 has 2 divisors, whose sum is σ = 15591502080. Its totient is φ = 15591502078.

The previous prime is 15591502061. The next prime is 15591502093. The reversal of 15591502079 is 97020519551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15591502079 - 2⁸ = 15591501823 is a prime.

It is a super-2 number, since 2×15591502079² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15591502019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7795751039 + 7795751040.

It is an arithmetic number, because the mean of its divisors is an integer number (7795751040).

Almost surely, 2^15591502079 is an apocalyptic number.

15591502079 is a deficient number, since it is larger than the sum of its proper divisors (1).

15591502079 is an equidigital number, since it uses as much as digits as its factorization.

15591502079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 15591502079 in words is "fifteen billion, five hundred ninety-one million, five hundred two thousand, seventy-nine".