27727157377 has 2 divisors, whose sum is σ = 27727157378. Its totient is φ = 27727157376.

The previous prime is 27727157309. The next prime is 27727157383. The reversal of 27727157377 is 77375172772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27641057536 + 86099841 = 166256^2 + 9279^2 .

It is a cyclic number.

It is not a de Polignac number, because 27727157377 - 2¹⁵ = 27727124609 is a prime.

It is not a weakly prime, because it can be changed into another prime (27727157677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863578688 + 13863578689.

It is an arithmetic number, because the mean of its divisors is an integer number (13863578689).

Almost surely, 2^27727157377 is an apocalyptic number.

It is an amenable number.

27727157377 is a deficient number, since it is larger than the sum of its proper divisors (1).

27727157377 is an equidigital number, since it uses as much as digits as its factorization.

27727157377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7058940, while the sum is 55.

The spelling of 27727157377 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred fifty-seven thousand, three hundred seventy-seven".