858534350909 has 16 divisors (see below), whose sum is σ = 889147269360. Its totient is φ = 828627148800.

The previous prime is 858534350893. The next prime is 858534350917. The reversal of 858534350909 is 909053435858.

It can be written as a sum of positive squares in 8 ways, for example, as 54418625284 + 804115725625 = 233278^2 + 896725^2 .

It is a cyclic number.

It is not a de Polignac number, because 858534350909 - 2⁴ = 858534350893 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858534352909) 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 in 15 ways as a sum of consecutive naturals, for example, 50942 + ... + 1311359.

It is an arithmetic number, because the mean of its divisors is an integer number (55571704335).

Almost surely, 2^858534350909 is an apocalyptic number.

858534350909 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

858534350909 is a deficient number, since it is larger than the sum of its proper divisors (30612918451).

858534350909 is a wasteful number, since it uses less digits than its factorization.

858534350909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362560.

The product of its (nonzero) digits is 23328000, while the sum is 59.

The spelling of 858534350909 in words is "eight hundred fifty-eight billion, five hundred thirty-four million, three hundred fifty thousand, nine hundred nine".