27758879999 has 2 divisors, whose sum is σ = 27758880000. Its totient is φ = 27758879998.

The previous prime is 27758879987. The next prime is 27758880059. The reversal of 27758879999 is 99997885772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27758879999 - 2⁴ = 27758879983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27758873999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13879439999 + 13879440000.

It is an arithmetic number, because the mean of its divisors is an integer number (13879440000).

Almost surely, 2^27758879999 is an apocalyptic number.

27758879999 is a deficient number, since it is larger than the sum of its proper divisors (1).

27758879999 is an equidigital number, since it uses as much as digits as its factorization.

27758879999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440270720, while the sum is 80.

The spelling of 27758879999 in words is "twenty-seven billion, seven hundred fifty-eight million, eight hundred seventy-nine thousand, nine hundred ninety-nine".