85911387504 has 80 divisors (see below), whose sum is σ = 229576556160. Its totient is φ = 27662618880.

The previous prime is 85911387451. The next prime is 85911387547. The reversal of 85911387504 is 40578311958.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72859 + ... + 420869.

It is an arithmetic number, because the mean of its divisors is an integer number (2869706952).

Almost surely, 2^85911387504 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 85911387504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114788278080).

85911387504 is an abundant number, since it is smaller than the sum of its proper divisors (143665168656).

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

85911387504 is a wasteful number, since it uses less digits than its factorization.

85911387504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348198 (or 348192 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 85911387504 in words is "eighty-five billion, nine hundred eleven million, three hundred eighty-seven thousand, five hundred four".