15797508191 has 2 divisors, whose sum is σ = 15797508192. Its totient is φ = 15797508190.

The previous prime is 15797508151. The next prime is 15797508203. The reversal of 15797508191 is 19180579751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15797508191 is a prime.

It is a super-2 number, since 2×15797508191² (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 (15797508151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7898754095 + 7898754096.

It is an arithmetic number, because the mean of its divisors is an integer number (7898754096).

Almost surely, 2^15797508191 is an apocalyptic number.

15797508191 is a deficient number, since it is larger than the sum of its proper divisors (1).

15797508191 is an equidigital number, since it uses as much as digits as its factorization.

15797508191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 53.

The spelling of 15797508191 in words is "fifteen billion, seven hundred ninety-seven million, five hundred eight thousand, one hundred ninety-one".