27156124979 has 2 divisors, whose sum is σ = 27156124980. Its totient is φ = 27156124978.

The previous prime is 27156124969. The next prime is 27156124981. The reversal of 27156124979 is 97942165172.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27156124979 - 2¹² = 27156120883 is a prime.

Together with 27156124981, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27156124979.

It is not a weakly prime, because it can be changed into another prime (27156124969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13578062489 + 13578062490.

It is an arithmetic number, because the mean of its divisors is an integer number (13578062490).

Almost surely, 2^27156124979 is an apocalyptic number.

27156124979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27156124979 is an equidigital number, since it uses as much as digits as its factorization.

27156124979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The spelling of 27156124979 in words is "twenty-seven billion, one hundred fifty-six million, one hundred twenty-four thousand, nine hundred seventy-nine".