28357269691 has 2 divisors, whose sum is σ = 28357269692. Its totient is φ = 28357269690.

The previous prime is 28357269667. The next prime is 28357269719. The reversal of 28357269691 is 19696275382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28357269691 - 2¹⁵ = 28357236923 is a prime.

It is not a weakly prime, because it can be changed into another prime (28357269601) 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, 14178634845 + 14178634846.

It is an arithmetic number, because the mean of its divisors is an integer number (14178634846).

Almost surely, 2^28357269691 is an apocalyptic number.

28357269691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28357269691 is an equidigital number, since it uses as much as digits as its factorization.

28357269691 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 28357269691 in words is "twenty-eight billion, three hundred fifty-seven million, two hundred sixty-nine thousand, six hundred ninety-one".