858788887849 has 2 divisors, whose sum is σ = 858788887850. Its totient is φ = 858788887848.

The previous prime is 858788887841. The next prime is 858788887903. The reversal of 858788887849 is 948788887858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823931997849 + 34856890000 = 907707^2 + 186700^2 .

It is a cyclic number.

It is not a de Polignac number, because 858788887849 - 2³ = 858788887841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 858788887849.

It is not a weakly prime, because it can be changed into another prime (858788887841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429394443924 + 429394443925.

It is an arithmetic number, because the mean of its divisors is an integer number (429394443925).

Almost surely, 2^858788887849 is an apocalyptic number.

It is an amenable number.

858788887849 is a deficient number, since it is larger than the sum of its proper divisors (1).

858788887849 is an equidigital number, since it uses as much as digits as its factorization.

858788887849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18496880640, while the sum is 88.

Subtracting 858788887849 from its reverse (948788887858), we obtain a palindrome (90000000009).

The spelling of 858788887849 in words is "eight hundred fifty-eight billion, seven hundred eighty-eight million, eight hundred eighty-seven thousand, eight hundred forty-nine".