28013051669 has 2 divisors, whose sum is σ = 28013051670. Its totient is φ = 28013051668.

The previous prime is 28013051617. The next prime is 28013051713. The reversal of 28013051669 is 96615031082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25772449444 + 2240602225 = 160538^2 + 47335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28013051669 is a prime.

It is a super-2 number, since 2×28013051669² (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 (28013050669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006525834 + 14006525835.

It is an arithmetic number, because the mean of its divisors is an integer number (14006525835).

Almost surely, 2^28013051669 is an apocalyptic number.

It is an amenable number.

28013051669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013051669 is an equidigital number, since it uses as much as digits as its factorization.

28013051669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 28013051669 in words is "twenty-eight billion, thirteen million, fifty-one thousand, six hundred sixty-nine".