28158522719 has 2 divisors, whose sum is σ = 28158522720. Its totient is φ = 28158522718.

The previous prime is 28158522703. The next prime is 28158522787. The reversal of 28158522719 is 91722585182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28158522719 - 2⁴ = 28158522703 is a prime.

It is a super-2 number, since 2×28158522719² (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 (28158522019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079261359 + 14079261360.

It is an arithmetic number, because the mean of its divisors is an integer number (14079261360).

Almost surely, 2^28158522719 is an apocalyptic number.

28158522719 is a deficient number, since it is larger than the sum of its proper divisors (1).

28158522719 is an equidigital number, since it uses as much as digits as its factorization.

28158522719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 50.

The spelling of 28158522719 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred twenty-two thousand, seven hundred nineteen".