85158144512 has 80 divisors (see below), whose sum is σ = 194545464960. Its totient is φ = 36479766528.

The previous prime is 85158144499. The next prime is 85158144541. The reversal of 85158144512 is 21544185158.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11031278 + ... + 11038994.

It is an arithmetic number, because the mean of its divisors is an integer number (2431818312).

Almost surely, 2^85158144512 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 85158144512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97272732480).

85158144512 is an abundant number, since it is smaller than the sum of its proper divisors (109387320448).

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

85158144512 is an equidigital number, since it uses as much as digits as its factorization.

85158144512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10821 (or 10805 counting only the distinct ones).

The product of its digits is 256000, while the sum is 44.

The spelling of 85158144512 in words is "eighty-five billion, one hundred fifty-eight million, one hundred forty-four thousand, five hundred twelve".