27771760231 has 2 divisors, whose sum is σ = 27771760232. Its totient is φ = 27771760230.

The previous prime is 27771760207. The next prime is 27771760277. The reversal of 27771760231 is 13206717772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27771760231 - 2²¹ = 27769663079 is a prime.

It is a super-2 number, since 2×27771760231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27771760531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885880115 + 13885880116.

It is an arithmetic number, because the mean of its divisors is an integer number (13885880116).

Almost surely, 2^27771760231 is an apocalyptic number.

27771760231 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771760231 is an equidigital number, since it uses as much as digits as its factorization.

27771760231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172872, while the sum is 43.

The spelling of 27771760231 in words is "twenty-seven billion, seven hundred seventy-one million, seven hundred sixty thousand, two hundred thirty-one".