28127396779 has 2 divisors, whose sum is σ = 28127396780. Its totient is φ = 28127396778.

The previous prime is 28127396741. The next prime is 28127396807. The reversal of 28127396779 is 97769372182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28127396779 - 2⁹ = 28127396267 is a prime.

It is not a weakly prime, because it can be changed into another prime (28127396729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063698389 + 14063698390.

It is an arithmetic number, because the mean of its divisors is an integer number (14063698390).

Almost surely, 2^28127396779 is an apocalyptic number.

28127396779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28127396779 is an equidigital number, since it uses as much as digits as its factorization.

28127396779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 61.

The spelling of 28127396779 in words is "twenty-eight billion, one hundred twenty-seven million, three hundred ninety-six thousand, seven hundred seventy-nine".