27771641539 has 2 divisors, whose sum is σ = 27771641540. Its totient is φ = 27771641538.

The previous prime is 27771641501. The next prime is 27771641549. The reversal of 27771641539 is 93514617772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27771641539 is a prime.

It is not a weakly prime, because it can be changed into another prime (27771641549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885820769 + 13885820770.

It is an arithmetic number, because the mean of its divisors is an integer number (13885820770).

Almost surely, 2^27771641539 is an apocalyptic number.

27771641539 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771641539 is an equidigital number, since it uses as much as digits as its factorization.

27771641539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 52.

The spelling of 27771641539 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty-one thousand, five hundred thirty-nine".