28587117187 has 2 divisors, whose sum is σ = 28587117188. Its totient is φ = 28587117186.

The previous prime is 28587117179. The next prime is 28587117233. The reversal of 28587117187 is 78171178582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28587117187 - 2³ = 28587117179 is a prime.

It is not a weakly prime, because it can be changed into another prime (28587117787) 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, 14293558593 + 14293558594.

It is an arithmetic number, because the mean of its divisors is an integer number (14293558594).

Almost surely, 2^28587117187 is an apocalyptic number.

28587117187 is a deficient number, since it is larger than the sum of its proper divisors (1).

28587117187 is an equidigital number, since it uses as much as digits as its factorization.

28587117187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1756160, while the sum is 55.

The spelling of 28587117187 in words is "twenty-eight billion, five hundred eighty-seven million, one hundred seventeen thousand, one hundred eighty-seven".