85844566 has 4 divisors (see below), whose sum is σ = 128766852. Its totient is φ = 42922282.

The previous prime is 85844537. The next prime is 85844567. The reversal of 85844566 is 66544858.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85844567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21461140 + ... + 21461143.

It is an arithmetic number, because the mean of its divisors is an integer number (32191713).

Almost surely, 2^85844566 is an apocalyptic number.

85844566 is a deficient number, since it is larger than the sum of its proper divisors (42922286).

85844566 is a wasteful number, since it uses less digits than its factorization.

85844566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42922285.

The product of its digits is 921600, while the sum is 46.

The square root of 85844566 is about 9265.2342657917. The cubic root of 85844566 is about 441.1344108951.

The spelling of 85844566 in words is "eighty-five million, eight hundred forty-four thousand, five hundred sixty-six".