12891514177 has 2 divisors, whose sum is σ = 12891514178. Its totient is φ = 12891514176.

The previous prime is 12891514169. The next prime is 12891514189. The reversal of 12891514177 is 77141519821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10204232256 + 2687281921 = 101016^2 + 51839^2 .

It is a cyclic number.

It is not a de Polignac number, because 12891514177 - 2³ = 12891514169 is a prime.

It is a super-2 number, since 2×12891514177² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12891514127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445757088 + 6445757089.

It is an arithmetic number, because the mean of its divisors is an integer number (6445757089).

Almost surely, 2^12891514177 is an apocalyptic number.

It is an amenable number.

12891514177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12891514177 is an equidigital number, since it uses as much as digits as its factorization.

12891514177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 46.

The spelling of 12891514177 in words is "twelve billion, eight hundred ninety-one million, five hundred fourteen thousand, one hundred seventy-seven".