85471164 has 18 divisors (see below), whose sum is σ = 216052200. Its totient is φ = 28490376.

The previous prime is 85471129. The next prime is 85471171. The reversal of 85471164 is 46117458.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2374199 = 85471164 / (8 + 5 + 4 + 7 + 1 + 1 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1187064 + ... + 1187135.

It is an arithmetic number, because the mean of its divisors is an integer number (12002900).

Almost surely, 2^85471164 is an apocalyptic number.

It is an amenable number.

85471164 is an abundant number, since it is smaller than the sum of its proper divisors (130581036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85471164 is a wasteful number, since it uses less digits than its factorization.

85471164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374209 (or 2374204 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 85471164 is about 9245.0616006601. The cubic root of 85471164 is about 440.4938738233.

The spelling of 85471164 in words is "eighty-five million, four hundred seventy-one thousand, one hundred sixty-four".