84859381836 has 96 divisors (see below), whose sum is σ = 226469234880. Its totient is φ = 27466463232.

The previous prime is 84859381823. The next prime is 84859381903. The reversal of 84859381836 is 63818395848.

84859381836 is a `hidden beast` number, since 8 + 4 + 8 + 593 + 8 + 1 + 8 + 36 = 666.

It is a super-2 number, since 2×84859381836² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478810 + ... + 631646.

It is an arithmetic number, because the mean of its divisors is an integer number (2359054530).

Almost surely, 2^84859381836 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 84859381836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113234617440).

84859381836 is an abundant number, since it is smaller than the sum of its proper divisors (141609853044).

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

84859381836 is a wasteful number, since it uses less digits than its factorization.

84859381836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153000 (or 152992 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 84859381836 in words is "eighty-four billion, eight hundred fifty-nine million, three hundred eighty-one thousand, eight hundred thirty-six".