12549116191187 has 2 divisors, whose sum is σ = 12549116191188. Its totient is φ = 12549116191186.

The previous prime is 12549116191147. The next prime is 12549116191211. The reversal of 12549116191187 is 78119161194521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12549116191187 is a prime.

It is not a weakly prime, because it can be changed into another prime (12549116191147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6274558095593 + 6274558095594.

It is an arithmetic number, because the mean of its divisors is an integer number (6274558095594).

Almost surely, 2^{12549116191187} is an apocalyptic number.

12549116191187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12549116191187 is an equidigital number, since it uses as much as digits as its factorization.

12549116191187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 56.

The spelling of 12549116191187 in words is "twelve trillion, five hundred forty-nine billion, one hundred sixteen million, one hundred ninety-one thousand, one hundred eighty-seven".