27825777979 has 2 divisors, whose sum is σ = 27825777980. Its totient is φ = 27825777978.

The previous prime is 27825777953. The next prime is 27825778009. The reversal of 27825777979 is 97977752872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27825777979 - 2¹¹ = 27825775931 is a prime.

It is not a weakly prime, because it can be changed into another prime (27825777919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13912888989 + 13912888990.

It is an arithmetic number, because the mean of its divisors is an integer number (13912888990).

Almost surely, 2^27825777979 is an apocalyptic number.

27825777979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27825777979 is an equidigital number, since it uses as much as digits as its factorization.

27825777979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217818720, while the sum is 70.

The spelling of 27825777979 in words is "twenty-seven billion, eight hundred twenty-five million, seven hundred seventy-seven thousand, nine hundred seventy-nine".