85611553 has 8 divisors (see below), whose sum is σ = 89586176. Its totient is φ = 81712800.

The previous prime is 85611529. The next prime is 85611557. The reversal of 85611553 is 35511658.

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

It is a cyclic number.

It is not a de Polignac number, because 85611553 - 2¹³ = 85603361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85611557) 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, 16653 + ... + 21178.

It is an arithmetic number, because the mean of its divisors is an integer number (11198272).

Almost surely, 2^85611553 is an apocalyptic number.

It is an amenable number.

85611553 is a deficient number, since it is larger than the sum of its proper divisors (3974623).

85611553 is a wasteful number, since it uses less digits than its factorization.

85611553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37935.

The product of its digits is 18000, while the sum is 34.

The square root of 85611553 is about 9252.6511335941. The cubic root of 85611553 is about 440.7349167829.

The spelling of 85611553 in words is "eighty-five million, six hundred eleven thousand, five hundred fifty-three".