27618278797 has 2 divisors, whose sum is σ = 27618278798. Its totient is φ = 27618278796.

The previous prime is 27618278773. The next prime is 27618278819. The reversal of 27618278797 is 79787281672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15950174436 + 11668104361 = 126294^2 + 108019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27618278797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27618278297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13809139398 + 13809139399.

It is an arithmetic number, because the mean of its divisors is an integer number (13809139399).

Almost surely, 2^27618278797 is an apocalyptic number.

It is an amenable number.

27618278797 is a deficient number, since it is larger than the sum of its proper divisors (1).

27618278797 is an equidigital number, since it uses as much as digits as its factorization.

27618278797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33191424, while the sum is 64.

The spelling of 27618278797 in words is "twenty-seven billion, six hundred eighteen million, two hundred seventy-eight thousand, seven hundred ninety-seven".