85663405 has 16 divisors (see below), whose sum is σ = 104177664. Its totient is φ = 67616640.

The previous prime is 85663397. The next prime is 85663411. The reversal of 85663405 is 50436658.

It is not a de Polignac number, because 85663405 - 2³ = 85663397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198540 + ... + 198970.

It is an arithmetic number, because the mean of its divisors is an integer number (6511104).

Almost surely, 2^85663405 is an apocalyptic number.

It is an amenable number.

85663405 is a deficient number, since it is larger than the sum of its proper divisors (18514259).

85663405 is a wasteful number, since it uses less digits than its factorization.

85663405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 85663405 is about 9255.4527171825. The cubic root of 85663405 is about 440.8238781980.

It can be divided in two parts, 85663 and 405, that added together give a palindrome (86068).

The spelling of 85663405 in words is "eighty-five million, six hundred sixty-three thousand, four hundred five".