85858544858531 has 4 divisors (see below), whose sum is σ = 85858595431392. Its totient is φ = 85858494285672.

The previous prime is 85858544858519. The next prime is 85858544858587. The reversal of 85858544858531 is 13585844585858.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85858544858531 - 2⁴⁶ = 15489800680867 is a prime.

It is a super-2 number, since 2×85858544858531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85858544858431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22648091 + ... + 26165876.

It is an arithmetic number, because the mean of its divisors is an integer number (21464648857848).

Almost surely, 2^{85858544858531} is an apocalyptic number.

85858544858531 is a deficient number, since it is larger than the sum of its proper divisors (50572861).

85858544858531 is a wasteful number, since it uses less digits than its factorization.

85858544858531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50572860.

The product of its digits is 4915200000, while the sum is 77.

The spelling of 85858544858531 in words is "eighty-five trillion, eight hundred fifty-eight billion, five hundred forty-four million, eight hundred fifty-eight thousand, five hundred thirty-one".