851858345 has 16 divisors (see below), whose sum is σ = 1101655632. Its totient is φ = 628611840.

The previous prime is 851858339. The next prime is 851858417. The reversal of 851858345 is 543858158.

It is a happy number.

851858345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 184307776 + 667550569 = 13576^2 + 25837^2 .

It is not a de Polignac number, because 851858345 - 2⁸ = 851858089 is a prime.

It is a super-2 number, since 2×851858345² = 1451325279892278050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) 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 self number, because there is not a number n which added to its sum of digits gives 851858345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106175 + ... + 113915.

It is an arithmetic number, because the mean of its divisors is an integer number (68853477).

Almost surely, 2^851858345 is an apocalyptic number.

It is an amenable number.

851858345 is a deficient number, since it is larger than the sum of its proper divisors (249797287).

851858345 is a wasteful number, since it uses less digits than its factorization.

851858345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9452.

The product of its digits is 768000, while the sum is 47.

The square root of 851858345 is about 29186.6124276182. The cubic root of 851858345 is about 947.9580685074.

The spelling of 851858345 in words is "eight hundred fifty-one million, eight hundred fifty-eight thousand, three hundred forty-five".