12108677857 has 2 divisors, whose sum is σ = 12108677858. Its totient is φ = 12108677856.

The previous prime is 12108677849. The next prime is 12108677863. The reversal of 12108677857 is 75877680121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10238201856 + 1870476001 = 101184^2 + 43249^2 .

It is an emirp because it is prime and its reverse (75877680121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12108677857 - 2³ = 12108677849 is a prime.

It is a super-2 number, since 2×12108677857² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12108674857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054338928 + 6054338929.

It is an arithmetic number, because the mean of its divisors is an integer number (6054338929).

Almost surely, 2^12108677857 is an apocalyptic number.

It is an amenable number.

12108677857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12108677857 is an equidigital number, since it uses as much as digits as its factorization.

12108677857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 12108677857 in words is "twelve billion, one hundred eight million, six hundred seventy-seven thousand, eight hundred fifty-seven".