27731426771 has 2 divisors, whose sum is σ = 27731426772. Its totient is φ = 27731426770.

The previous prime is 27731426719. The next prime is 27731426809. The reversal of 27731426771 is 17762413772.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27731426771 is a prime.

It is not a weakly prime, because it can be changed into another prime (27731426711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865713385 + 13865713386.

It is an arithmetic number, because the mean of its divisors is an integer number (13865713386).

Almost surely, 2^27731426771 is an apocalyptic number.

27731426771 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731426771 is an equidigital number, since it uses as much as digits as its factorization.

27731426771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 47.

The spelling of 27731426771 in words is "twenty-seven billion, seven hundred thirty-one million, four hundred twenty-six thousand, seven hundred seventy-one".