853655891 has 8 divisors (see below), whose sum is σ = 931710144. Its totient is φ = 775676520.

The previous prime is 853655843. The next prime is 853655893. The reversal of 853655891 is 198556358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 853655891 - 2¹⁸ = 853393747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853655893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6620 + ... + 41846.

It is an arithmetic number, because the mean of its divisors is an integer number (116463768).

Almost surely, 2^853655891 is an apocalyptic number.

853655891 is a deficient number, since it is larger than the sum of its proper divisors (78054253).

853655891 is a wasteful number, since it uses less digits than its factorization.

853655891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37441.

The product of its digits is 1296000, while the sum is 50.

The square root of 853655891 is about 29217.3902154179. The cubic root of 853655891 is about 948.6243768928.

The spelling of 853655891 in words is "eight hundred fifty-three million, six hundred fifty-five thousand, eight hundred ninety-one".