85710561 has 16 divisors (see below), whose sum is σ = 116323200. Its totient is φ = 56125440.

The previous prime is 85710553. The next prime is 85710587. The reversal of 85710561 is 16501758.

It is not a de Polignac number, because 85710561 - 2³ = 85710553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85710511) 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, 73761 + ... + 74913.

It is an arithmetic number, because the mean of its divisors is an integer number (7270200).

Almost surely, 2^85710561 is an apocalyptic number.

It is an amenable number.

85710561 is a deficient number, since it is larger than the sum of its proper divisors (30612639).

85710561 is a wasteful number, since it uses less digits than its factorization.

85710561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 85710561 is about 9257.9998379780. Note that the first 3 decimals coincide. The cubic root of 85710561 is about 440.9047516180.

The spelling of 85710561 in words is "eighty-five million, seven hundred ten thousand, five hundred sixty-one".