28056864271 has 2 divisors, whose sum is σ = 28056864272. Its totient is φ = 28056864270.

The previous prime is 28056864259. The next prime is 28056864281. The reversal of 28056864271 is 17246865082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28056864271 - 2⁹ = 28056863759 is a prime.

It is a super-2 number, since 2×28056864271² (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 (28056864281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028432135 + 14028432136.

It is an arithmetic number, because the mean of its divisors is an integer number (14028432136).

Almost surely, 2^28056864271 is an apocalyptic number.

28056864271 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056864271 is an equidigital number, since it uses as much as digits as its factorization.

28056864271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 28056864271 in words is "twenty-eight billion, fifty-six million, eight hundred sixty-four thousand, two hundred seventy-one".