28100822669 has 2 divisors, whose sum is σ = 28100822670. Its totient is φ = 28100822668.

The previous prime is 28100822657. The next prime is 28100822693. The reversal of 28100822669 is 96622800182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25476309769 + 2624512900 = 159613^2 + 51230^2 .

It is a cyclic number.

It is not a de Polignac number, because 28100822669 - 2⁸ = 28100822413 is a prime.

It is a super-2 number, since 2×28100822669² (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 (28100822699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14050411334 + 14050411335.

It is an arithmetic number, because the mean of its divisors is an integer number (14050411335).

Almost surely, 2^28100822669 is an apocalyptic number.

It is an amenable number.

28100822669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28100822669 is an equidigital number, since it uses as much as digits as its factorization.

28100822669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 28100822669 in words is "twenty-eight billion, one hundred million, eight hundred twenty-two thousand, six hundred sixty-nine".