28013091347569 has 2 divisors, whose sum is σ = 28013091347570. Its totient is φ = 28013091347568.

The previous prime is 28013091347491. The next prime is 28013091347573. The reversal of 28013091347569 is 96574319031082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19022568851169 + 8990522496400 = 4361487^2 + 2998420^2 .

It is a cyclic number.

It is not a de Polignac number, because 28013091347569 - 2¹⁵ = 28013091314801 is a prime.

It is a super-2 number, since 2×28013091347569² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28013091347369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006545673784 + 14006545673785.

It is an arithmetic number, because the mean of its divisors is an integer number (14006545673785).

It is a 1-persistent number, because it is pandigital, but 2⋅28013091347569 = 56026182695138 is not.

Almost surely, 2^{28013091347569} is an apocalyptic number.

It is an amenable number.

28013091347569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013091347569 is an equidigital number, since it uses as much as digits as its factorization.

28013091347569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 28013091347569 in words is "twenty-eight trillion, thirteen billion, ninety-one million, three hundred forty-seven thousand, five hundred sixty-nine".