27777780859 has 2 divisors, whose sum is σ = 27777780860. Its totient is φ = 27777780858.

The previous prime is 27777780757. The next prime is 27777780893. The reversal of 27777780859 is 95808777772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27777780859 - 2¹⁷ = 27777649787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27777780794 and 27777780803.

It is not a weakly prime, because it can be changed into another prime (27777780559) 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, 13888890429 + 13888890430.

It is an arithmetic number, because the mean of its divisors is an integer number (13888890430).

Almost surely, 2^27777780859 is an apocalyptic number.

27777780859 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777780859 is an equidigital number, since it uses as much as digits as its factorization.

27777780859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96808320, while the sum is 67.

The spelling of 27777780859 in words is "twenty-seven billion, seven hundred seventy-seven million, seven hundred eighty thousand, eight hundred fifty-nine".