28321268669 has 2 divisors, whose sum is σ = 28321268670. Its totient is φ = 28321268668.

The previous prime is 28321268663. The next prime is 28321268713. The reversal of 28321268669 is 96686212382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24347857444 + 3973411225 = 156038^2 + 63035^2 .

It is a cyclic number.

It is not a de Polignac number, because 28321268669 - 2²⁸ = 28052833213 is a prime.

It is a super-2 number, since 2×28321268669² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28321268669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28321268663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160634334 + 14160634335.

It is an arithmetic number, because the mean of its divisors is an integer number (14160634335).

Almost surely, 2^28321268669 is an apocalyptic number.

It is an amenable number.

28321268669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321268669 is an equidigital number, since it uses as much as digits as its factorization.

28321268669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 53.

The spelling of 28321268669 in words is "twenty-eight billion, three hundred twenty-one million, two hundred sixty-eight thousand, six hundred sixty-nine".