15715887191 has 2 divisors, whose sum is σ = 15715887192. Its totient is φ = 15715887190.

The previous prime is 15715887157. The next prime is 15715887211. The reversal of 15715887191 is 19178851751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15715887191 is a prime.

It is a super-2 number, since 2×15715887191² (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 (15715887101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857943595 + 7857943596.

It is an arithmetic number, because the mean of its divisors is an integer number (7857943596).

Almost surely, 2^15715887191 is an apocalyptic number.

15715887191 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715887191 is an equidigital number, since it uses as much as digits as its factorization.

15715887191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 53.

The spelling of 15715887191 in words is "fifteen billion, seven hundred fifteen million, eight hundred eighty-seven thousand, one hundred ninety-one".