85814500581 has 24 divisors (see below), whose sum is σ = 125405344064. Its totient is φ = 56541576960.

The previous prime is 85814500523. The next prime is 85814500643. The reversal of 85814500581 is 18500541858.

85814500581 is a `hidden beast` number, since 8 + 5 + 8 + 14 + 50 + 0 + 581 = 666.

It is not a de Polignac number, because 85814500581 - 2⁶ = 85814500517 is a prime.

It is a super-2 number, since 2×85814500581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85814500781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 567066 + ... + 702276.

Almost surely, 2^85814500581 is an apocalyptic number.

It is an amenable number.

85814500581 is a deficient number, since it is larger than the sum of its proper divisors (39590843483).

85814500581 is a wasteful number, since it uses less digits than its factorization.

85814500581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136041 (or 136038 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

The spelling of 85814500581 in words is "eighty-five billion, eight hundred fourteen million, five hundred thousand, five hundred eighty-one".