85813646 has 16 divisors (see below), whose sum is σ = 130775040. Its totient is φ = 42227640.

The previous prime is 85813643. The next prime is 85813657. The reversal of 85813646 is 64631858.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85813643) 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, 31985 + ... + 34563.

It is an arithmetic number, because the mean of its divisors is an integer number (8173440).

Almost surely, 2^85813646 is an apocalyptic number.

85813646 is a deficient number, since it is larger than the sum of its proper divisors (44961394).

85813646 is a wasteful number, since it uses less digits than its factorization.

85813646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839.

The product of its digits is 138240, while the sum is 41.

The square root of 85813646 is about 9263.5655122636. The cubic root of 85813646 is about 441.0814410739.

The spelling of 85813646 in words is "eighty-five million, eight hundred thirteen thousand, six hundred forty-six".