849866945 has 16 divisors (see below), whose sum is σ = 1043571600. Its totient is φ = 664224000.

The previous prime is 849866939. The next prime is 849866957. The reversal of 849866945 is 549668948.

849866945 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 411927616 + 437939329 = 20296^2 + 20927^2 .

It is not a de Polignac number, because 849866945 - 2⁴ = 849866929 is a prime.

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, 36095 + ... + 54795.

It is an arithmetic number, because the mean of its divisors is an integer number (65223225).

Almost surely, 2^849866945 is an apocalyptic number.

It is an amenable number.

849866945 is a deficient number, since it is larger than the sum of its proper divisors (193704655).

849866945 is a wasteful number, since it uses less digits than its factorization.

849866945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18916.

The product of its digits is 14929920, while the sum is 59.

The square root of 849866945 is about 29152.4775104964. The cubic root of 849866945 is about 947.2188076360.

The spelling of 849866945 in words is "eight hundred forty-nine million, eight hundred sixty-six thousand, nine hundred forty-five".