12516572191 has 2 divisors, whose sum is σ = 12516572192. Its totient is φ = 12516572190.

The previous prime is 12516572177. The next prime is 12516572207. The reversal of 12516572191 is 19127561521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12516572191 - 2²⁷ = 12382354463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12516572171) 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, 6258286095 + 6258286096.

It is an arithmetic number, because the mean of its divisors is an integer number (6258286096).

Almost surely, 2^12516572191 is an apocalyptic number.

12516572191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516572191 is an equidigital number, since it uses as much as digits as its factorization.

12516572191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 40.

The spelling of 12516572191 in words is "twelve billion, five hundred sixteen million, five hundred seventy-two thousand, one hundred ninety-one".