85611657 has 8 divisors (see below), whose sum is σ = 114321184. Its totient is φ = 56988288.

The previous prime is 85611653. The next prime is 85611679. The reversal of 85611657 is 75611658.

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

It is not a de Polignac number, because 85611657 - 2² = 85611653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85611653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19183 + ... + 23220.

It is an arithmetic number, because the mean of its divisors is an integer number (14290148).

Almost surely, 2^85611657 is an apocalyptic number.

It is an amenable number.

85611657 is a deficient number, since it is larger than the sum of its proper divisors (28709527).

85611657 is a wasteful number, since it uses less digits than its factorization.

85611657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43079.

The product of its digits is 50400, while the sum is 39.

The square root of 85611657 is about 9252.6567536033. The cubic root of 85611657 is about 440.7350952496.

Subtracting from 85611657 its reverse (75611658), we obtain a palindrome (9999999).

It can be divided in two parts, 85611 and 657, that added together give a palindrome (86268).

The spelling of 85611657 in words is "eighty-five million, six hundred eleven thousand, six hundred fifty-seven".