27777673793 has 2 divisors, whose sum is σ = 27777673794. Its totient is φ = 27777673792.

The previous prime is 27777673747. The next prime is 27777673811. The reversal of 27777673793 is 39737677772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16326961729 + 11450712064 = 127777^2 + 107008^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777673793 - 2⁸ = 27777673537 is a prime.

It is a super-2 number, since 2×27777673793² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27777673393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888836896 + 13888836897.

It is an arithmetic number, because the mean of its divisors is an integer number (13888836897).

Almost surely, 2^27777673793 is an apocalyptic number.

It is an amenable number.

27777673793 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777673793 is an equidigital number, since it uses as much as digits as its factorization.

27777673793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114354828, while the sum is 65.

The spelling of 27777673793 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-three thousand, seven hundred ninety-three".