85791568 has 10 divisors (see below), whose sum is σ = 166221194. Its totient is φ = 42895776.

The previous prime is 85791533. The next prime is 85791569. The reversal of 85791568 is 86519758.

It can be written as a sum of positive squares in only one way, i.e., 83320384 + 2471184 = 9128^2 + 1572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85791569) 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 as a sum of consecutive naturals, namely, 2680971 + ... + 2681002.

Almost surely, 2^85791568 is an apocalyptic number.

It is an amenable number.

85791568 is a deficient number, since it is larger than the sum of its proper divisors (80429626).

85791568 is a wasteful number, since it uses less digits than its factorization.

85791568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361981 (or 5361975 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The square root of 85791568 is about 9262.3737778174. The cubic root of 85791568 is about 441.0436109160.

The spelling of 85791568 in words is "eighty-five million, seven hundred ninety-one thousand, five hundred sixty-eight".