26850856189 has 2 divisors, whose sum is σ = 26850856190. Its totient is φ = 26850856188.

The previous prime is 26850856127. The next prime is 26850856199. The reversal of 26850856189 is 98165805862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23795530564 + 3055325625 = 154258^2 + 55275^2 .

It is a cyclic number.

It is not a de Polignac number, because 26850856189 - 2²¹ = 26848759037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26850856199) 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, 13425428094 + 13425428095.

It is an arithmetic number, because the mean of its divisors is an integer number (13425428095).

Almost surely, 2^26850856189 is an apocalyptic number.

It is an amenable number.

26850856189 is a deficient number, since it is larger than the sum of its proper divisors (1).

26850856189 is an equidigital number, since it uses as much as digits as its factorization.

26850856189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8294400, while the sum is 58.

The spelling of 26850856189 in words is "twenty-six billion, eight hundred fifty million, eight hundred fifty-six thousand, one hundred eighty-nine".