28088080681 has 2 divisors, whose sum is σ = 28088080682. Its totient is φ = 28088080680.

The previous prime is 28088080651. The next prime is 28088080693. The reversal of 28088080681 is 18608088082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17296195225 + 10791885456 = 131515^2 + 103884^2 .

It is a cyclic number.

It is not a de Polignac number, because 28088080681 - 2⁵ = 28088080649 is a prime.

It is a super-2 number, since 2×28088080681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28088080651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14044040340 + 14044040341.

It is an arithmetic number, because the mean of its divisors is an integer number (14044040341).

Almost surely, 2^28088080681 is an apocalyptic number.

It is an amenable number.

28088080681 is a deficient number, since it is larger than the sum of its proper divisors (1).

28088080681 is an equidigital number, since it uses as much as digits as its factorization.

28088080681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393216, while the sum is 49.

The spelling of 28088080681 in words is "twenty-eight billion, eighty-eight million, eighty thousand, six hundred eighty-one".