12156793277 has 2 divisors, whose sum is σ = 12156793278. Its totient is φ = 12156793276.

The previous prime is 12156793241. The next prime is 12156793291. The reversal of 12156793277 is 77239765121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12061750276 + 95043001 = 109826^2 + 9749^2 .

It is a cyclic number.

It is not a de Polignac number, because 12156793277 - 2¹² = 12156789181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12156793877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078396638 + 6078396639.

It is an arithmetic number, because the mean of its divisors is an integer number (6078396639).

Almost surely, 2^12156793277 is an apocalyptic number.

It is an amenable number.

12156793277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156793277 is an equidigital number, since it uses as much as digits as its factorization.

12156793277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 50.

The spelling of 12156793277 in words is "twelve billion, one hundred fifty-six million, seven hundred ninety-three thousand, two hundred seventy-seven".