27727157677 has 2 divisors, whose sum is σ = 27727157678. Its totient is φ = 27727157676.

The previous prime is 27727157669. The next prime is 27727157687. The reversal of 27727157677 is 77675172772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26058353476 + 1668804201 = 161426^2 + 40851^2 .

It is a cyclic number.

It is not a de Polignac number, because 27727157677 - 2³ = 27727157669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27727157687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863578838 + 13863578839.

It is an arithmetic number, because the mean of its divisors is an integer number (13863578839).

Almost surely, 2^27727157677 is an apocalyptic number.

It is an amenable number.

27727157677 is a deficient number, since it is larger than the sum of its proper divisors (1).

27727157677 is an equidigital number, since it uses as much as digits as its factorization.

27727157677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14117880, while the sum is 58.

The spelling of 27727157677 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred fifty-seven thousand, six hundred seventy-seven".