85549569 has 16 divisors (see below), whose sum is σ = 130790400. Its totient is φ = 48724560.

The previous prime is 85549547. The next prime is 85549573. The reversal of 85549569 is 96594558.

It is not a de Polignac number, because 85549569 - 2⁸ = 85549313 is a prime.

It is a super-2 number, since 2×85549569² = 14637457512171522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85549589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19 + ... + 13080.

It is an arithmetic number, because the mean of its divisors is an integer number (8174400).

Almost surely, 2^85549569 is an apocalyptic number.

It is an amenable number.

85549569 is a deficient number, since it is larger than the sum of its proper divisors (45240831).

85549569 is a wasteful number, since it uses less digits than its factorization.

85549569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13420.

The product of its digits is 1944000, while the sum is 51.

The square root of 85549569 is about 9249.3010006162. The cubic root of 85549569 is about 440.6285249555.

The spelling of 85549569 in words is "eighty-five million, five hundred forty-nine thousand, five hundred sixty-nine".