858236061816 has 160 divisors (see below), whose sum is σ = 2747695104000. Its totient is φ = 245171790144.

The previous prime is 858236061721. The next prime is 858236061829. The reversal of 858236061816 is 618160632858.

858236061816 is a `hidden beast` number, since 8 + 5 + 8 + 2 + 3 + 6 + 0 + 618 + 16 = 666.

858236061816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41897865 + ... + 41918343.

It is an arithmetic number, because the mean of its divisors is an integer number (17173094400).

Almost surely, 2^858236061816 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 858236061816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373847552000).

858236061816 is an abundant number, since it is smaller than the sum of its proper divisors (1889459042184).

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

858236061816 is a wasteful number, since it uses less digits than its factorization.

858236061816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29743 (or 29730 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 858236061816 in words is "eight hundred fifty-eight billion, two hundred thirty-six million, sixty-one thousand, eight hundred sixteen".