85618685 has 8 divisors (see below), whose sum is σ = 104427096. Its totient is φ = 67371840.

The previous prime is 85618667. The next prime is 85618711. The reversal of 85618685 is 58681658.

It can be written as a sum of positive squares in 4 ways, for example, as 676 + 85618009 = 26^2 + 9253^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-85618685 is a prime.

It is a super-2 number, since 2×85618685² = 14661118442258450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140054 + ... + 140663.

It is an arithmetic number, because the mean of its divisors is an integer number (13053387).

Almost surely, 2^85618685 is an apocalyptic number.

It is an amenable number.

85618685 is a deficient number, since it is larger than the sum of its proper divisors (18808411).

85618685 is a wasteful number, since it uses less digits than its factorization.

85618685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280783.

The product of its digits is 460800, while the sum is 47.

The square root of 85618685 is about 9253.0365286213. The cubic root of 85618685 is about 440.7471551395.

The spelling of 85618685 in words is "eighty-five million, six hundred eighteen thousand, six hundred eighty-five".