853668864 has 132 divisors (see below), whose sum is σ = 2482274080. Its totient is φ = 282562560.

The previous prime is 853668863. The next prime is 853668877. The reversal of 853668864 is 468866358.

It is a self number, because there is not a number n which added to its sum of digits gives 853668864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853668863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1944357 + ... + 1944795.

Almost surely, 2^853668864 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 853668864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241137040).

853668864 is an abundant number, since it is smaller than the sum of its proper divisors (1628605216).

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

853668864 is a wasteful number, since it uses less digits than its factorization.

853668864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 655 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 853668864 is about 29217.6122227673. The cubic root of 853668864 is about 948.6291822801.

The spelling of 853668864 in words is "eight hundred fifty-three million, six hundred sixty-eight thousand, eight hundred sixty-four".