12455196172891 has 2 divisors, whose sum is σ = 12455196172892. Its totient is φ = 12455196172890.

The previous prime is 12455196172823. The next prime is 12455196172907. The reversal of 12455196172891 is 19827169155421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12455196172891 is a prime.

It is a super-2 number, since 2×12455196172891² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12455196172801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6227598086445 + 6227598086446.

It is an arithmetic number, because the mean of its divisors is an integer number (6227598086446).

Almost surely, 2^{12455196172891} is an apocalyptic number.

12455196172891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12455196172891 is an equidigital number, since it uses as much as digits as its factorization.

12455196172891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 61.

The spelling of 12455196172891 in words is "twelve trillion, four hundred fifty-five billion, one hundred ninety-six million, one hundred seventy-two thousand, eight hundred ninety-one".