85996561 has 8 divisors (see below), whose sum is σ = 98460864. Its totient is φ = 73577040.

The previous prime is 85996553. The next prime is 85996579. The reversal of 85996561 is 16569958.

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 85996561 - 2³ = 85996553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85996961) 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, 6970 + ... + 14851.

It is an arithmetic number, because the mean of its divisors is an integer number (12307608).

Almost surely, 2^85996561 is an apocalyptic number.

It is an amenable number.

85996561 is a deficient number, since it is larger than the sum of its proper divisors (12464303).

85996561 is a wasteful number, since it uses less digits than its factorization.

85996561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22391.

The product of its digits is 583200, while the sum is 49.

The square root of 85996561 is about 9273.4330751885. The cubic root of 85996561 is about 441.3946125367.

The spelling of 85996561 in words is "eighty-five million, nine hundred ninety-six thousand, five hundred sixty-one".