28397935144591 has 2 divisors, whose sum is σ = 28397935144592. Its totient is φ = 28397935144590.

The previous prime is 28397935144387. The next prime is 28397935144619. The reversal of 28397935144591 is 19544153979382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28397935144591 - 2²⁵ = 28397901590159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28397935144591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28397935124591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14198967572295 + 14198967572296.

It is an arithmetic number, because the mean of its divisors is an integer number (14198967572296).

Almost surely, 2^{28397935144591} is an apocalyptic number.

28397935144591 is a deficient number, since it is larger than the sum of its proper divisors (1).

28397935144591 is an equidigital number, since it uses as much as digits as its factorization.

28397935144591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 293932800, while the sum is 70.

The spelling of 28397935144591 in words is "twenty-eight trillion, three hundred ninety-seven billion, nine hundred thirty-five million, one hundred forty-four thousand, five hundred ninety-one".