85458623868 has 72 divisors (see below), whose sum is σ = 221030409600. Its totient is φ = 27831478176.

The previous prime is 85458623863. The next prime is 85458623891. The reversal of 85458623868 is 86832685458.

85458623868 is a `hidden beast` number, since 8 + 545 + 8 + 6 + 2 + 3 + 86 + 8 = 666.

It is a super-3 number, since 3×85458623868³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85458623863) 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, 222793 + ... + 469631.

It is an arithmetic number, because the mean of its divisors is an integer number (3069866800).

Almost surely, 2^85458623868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85458623868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110515204800).

85458623868 is an abundant number, since it is smaller than the sum of its proper divisors (135571785732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85458623868 is a wasteful number, since it uses less digits than its factorization.

85458623868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247071 (or 247066 counting only the distinct ones).

The product of its digits is 88473600, while the sum is 63.

The spelling of 85458623868 in words is "eighty-five billion, four hundred fifty-eight million, six hundred twenty-three thousand, eight hundred sixty-eight".