27807780079 has 2 divisors, whose sum is σ = 27807780080. Its totient is φ = 27807780078.

The previous prime is 27807780023. The next prime is 27807780083. The reversal of 27807780079 is 97008770872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27807780079 - 2²³ = 27799391471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27807780019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13903890039 + 13903890040.

It is an arithmetic number, because the mean of its divisors is an integer number (13903890040).

Almost surely, 2^27807780079 is an apocalyptic number.

27807780079 is a deficient number, since it is larger than the sum of its proper divisors (1).

27807780079 is an equidigital number, since it uses as much as digits as its factorization.

27807780079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2765952, while the sum is 55.

The spelling of 27807780079 in words is "twenty-seven billion, eight hundred seven million, seven hundred eighty thousand, seventy-nine".