850673664 has 150 divisors (see below), whose sum is σ = 2545406094. Its totient is φ = 283115520.

The previous prime is 850673627. The next prime is 850673671. The reversal of 850673664 is 466376058.

It can be written as a sum of positive squares in only one way, i.e., 829440000 + 21233664 = 28800^2 + 4608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1326784 + ... + 1327424.

Almost surely, 2^850673664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 850673664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272703047).

850673664 is an abundant number, since it is smaller than the sum of its proper divisors (1694732430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

850673664 is an frugal number, since it uses more digits than its factorization.

850673664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 850673664 is about 29166.3104283007. The cubic root of 850673664 is about 947.5184222834.

The spelling of 850673664 in words is "eight hundred fifty million, six hundred seventy-three thousand, six hundred sixty-four".