28069611569 has 2 divisors, whose sum is σ = 28069611570. Its totient is φ = 28069611568.

The previous prime is 28069611529. The next prime is 28069611617. The reversal of 28069611569 is 96511696082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27556000000 + 513611569 = 166000^2 + 22663^2 .

It is a cyclic number.

It is not a de Polignac number, because 28069611569 - 2¹⁶ = 28069546033 is a prime.

It is a super-2 number, since 2×28069611569² (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 28069611569.

It is not a weakly prime, because it can be changed into another prime (28069611529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14034805784 + 14034805785.

It is an arithmetic number, because the mean of its divisors is an integer number (14034805785).

Almost surely, 2^28069611569 is an apocalyptic number.

It is an amenable number.

28069611569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28069611569 is an equidigital number, since it uses as much as digits as its factorization.

28069611569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 28069611569 in words is "twenty-eight billion, sixty-nine million, six hundred eleven thousand, five hundred sixty-nine".