27751740979 has 2 divisors, whose sum is σ = 27751740980. Its totient is φ = 27751740978.

The previous prime is 27751740977. The next prime is 27751741027. The reversal of 27751740979 is 97904715772.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27751740979 - 2¹ = 27751740977 is a prime.

Together with 27751740977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27751740977) 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, 13875870489 + 13875870490.

It is an arithmetic number, because the mean of its divisors is an integer number (13875870490).

Almost surely, 2^27751740979 is an apocalyptic number.

27751740979 is a deficient number, since it is larger than the sum of its proper divisors (1).

27751740979 is an equidigital number, since it uses as much as digits as its factorization.

27751740979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7779240, while the sum is 58.

The spelling of 27751740979 in words is "twenty-seven billion, seven hundred fifty-one million, seven hundred forty thousand, nine hundred seventy-nine".