26857028173 has 2 divisors, whose sum is σ = 26857028174. Its totient is φ = 26857028172.

The previous prime is 26857028119. The next prime is 26857028197. The reversal of 26857028173 is 37182075862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14078534409 + 12778493764 = 118653^2 + 113042^2 .

It is a cyclic number.

It is not a de Polignac number, because 26857028173 - 2¹⁷ = 26856897101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26857028113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13428514086 + 13428514087.

It is an arithmetic number, because the mean of its divisors is an integer number (13428514087).

Almost surely, 2^26857028173 is an apocalyptic number.

It is an amenable number.

26857028173 is a deficient number, since it is larger than the sum of its proper divisors (1).

26857028173 is an equidigital number, since it uses as much as digits as its factorization.

26857028173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 26857028173 in words is "twenty-six billion, eight hundred fifty-seven million, twenty-eight thousand, one hundred seventy-three".