28159094261 has 2 divisors, whose sum is σ = 28159094262. Its totient is φ = 28159094260.

The previous prime is 28159094209. The next prime is 28159094291. The reversal of 28159094261 is 16249095182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16254975025 + 11904119236 = 127495^2 + 109106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28159094261 is a prime.

It is a super-2 number, since 2×28159094261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28159094291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079547130 + 14079547131.

It is an arithmetic number, because the mean of its divisors is an integer number (14079547131).

Almost surely, 2^28159094261 is an apocalyptic number.

It is an amenable number.

28159094261 is a deficient number, since it is larger than the sum of its proper divisors (1).

28159094261 is an equidigital number, since it uses as much as digits as its factorization.

28159094261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 28159094261 in words is "twenty-eight billion, one hundred fifty-nine million, ninety-four thousand, two hundred sixty-one".