28158568847 has 2 divisors, whose sum is σ = 28158568848. Its totient is φ = 28158568846.

The previous prime is 28158568829. The next prime is 28158568853. The reversal of 28158568847 is 74886585182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28158568847 - 2¹⁰ = 28158567823 is a prime.

It is a super-2 number, since 2×28158568847² (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 28158568847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28158568147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14079284423 + 14079284424.

It is an arithmetic number, because the mean of its divisors is an integer number (14079284424).

Almost surely, 2^28158568847 is an apocalyptic number.

28158568847 is a deficient number, since it is larger than the sum of its proper divisors (1).

28158568847 is an equidigital number, since it uses as much as digits as its factorization.

28158568847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34406400, while the sum is 62.

The spelling of 28158568847 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred sixty-eight thousand, eight hundred forty-seven".