27731660279 has 2 divisors, whose sum is σ = 27731660280. Its totient is φ = 27731660278.

The previous prime is 27731660249. The next prime is 27731660293. The reversal of 27731660279 is 97206613772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27731660279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27731660219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865830139 + 13865830140.

It is an arithmetic number, because the mean of its divisors is an integer number (13865830140).

Almost surely, 2^27731660279 is an apocalyptic number.

27731660279 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731660279 is an equidigital number, since it uses as much as digits as its factorization.

27731660279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 50.

The spelling of 27731660279 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred sixty thousand, two hundred seventy-nine".