181827116536 has 128 divisors (see below), whose sum is σ = 389140899840. Its totient is φ = 79062796800.

The previous prime is 181827116531. The next prime is 181827116557. The reversal of 181827116536 is 635611728181.

It is a happy number.

It is a super-2 number, since 2×181827116536² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181827116536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181827116531) 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 31 ways as a sum of consecutive naturals, for example, 22380171 + ... + 22388293.

It is an arithmetic number, because the mean of its divisors is an integer number (3040163280).

Almost surely, 2^181827116536 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 181827116536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194570449920).

181827116536 is an abundant number, since it is smaller than the sum of its proper divisors (207313783304).

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

181827116536 is a wasteful number, since it uses less digits than its factorization.

181827116536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357 (or 8353 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The spelling of 181827116536 in words is "one hundred eighty-one billion, eight hundred twenty-seven million, one hundred sixteen thousand, five hundred thirty-six".