85165564 has 24 divisors (see below), whose sum is σ = 166986288. Its totient is φ = 37664640.

The previous prime is 85165513. The next prime is 85165567. The reversal of 85165564 is 46556158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85165567) 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, 24529 + ... + 27784.

It is an arithmetic number, because the mean of its divisors is an integer number (6957762).

Almost surely, 2^85165564 is an apocalyptic number.

It is an amenable number.

85165564 is a deficient number, since it is larger than the sum of its proper divisors (81820724).

85165564 is a wasteful number, since it uses less digits than its factorization.

85165564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52365 (or 52363 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The square root of 85165564 is about 9228.5190577904. The cubic root of 85165564 is about 439.9682552855.

It can be divided in two parts, 85 and 165564, that added together give a square (165649 = 407²).

The spelling of 85165564 in words is "eighty-five million, one hundred sixty-five thousand, five hundred sixty-four".