27985458079 has 2 divisors, whose sum is σ = 27985458080. Its totient is φ = 27985458078.

The previous prime is 27985458077. The next prime is 27985458107. The reversal of 27985458079 is 97085458972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27985458079 - 2¹ = 27985458077 is a prime.

Together with 27985458077, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27985458079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27985458077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13992729039 + 13992729040.

It is an arithmetic number, because the mean of its divisors is an integer number (13992729040).

Almost surely, 2^27985458079 is an apocalyptic number.

27985458079 is a deficient number, since it is larger than the sum of its proper divisors (1).

27985458079 is an equidigital number, since it uses as much as digits as its factorization.

27985458079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 27985458079 in words is "twenty-seven billion, nine hundred eighty-five million, four hundred fifty-eight thousand, seventy-nine".