27139733977 has 2 divisors, whose sum is σ = 27139733978. Its totient is φ = 27139733976.

The previous prime is 27139733927. The next prime is 27139733987. The reversal of 27139733977 is 77933793172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26834043721 + 305690256 = 163811^2 + 17484^2 .

It is a cyclic number.

It is not a de Polignac number, because 27139733977 - 2⁷ = 27139733849 is a prime.

It is not a weakly prime, because it can be changed into another prime (27139733927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13569866988 + 13569866989.

It is an arithmetic number, because the mean of its divisors is an integer number (13569866989).

Almost surely, 2^27139733977 is an apocalyptic number.

It is an amenable number.

27139733977 is a deficient number, since it is larger than the sum of its proper divisors (1).

27139733977 is an equidigital number, since it uses as much as digits as its factorization.

27139733977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10501974, while the sum is 58.

The spelling of 27139733977 in words is "twenty-seven billion, one hundred thirty-nine million, seven hundred thirty-three thousand, nine hundred seventy-seven".