181612017618 has 8 divisors (see below), whose sum is σ = 363224035248. Its totient is φ = 60537339204.

The previous prime is 181612017553. The next prime is 181612017619. The reversal of 181612017618 is 816710216181.

It is a sphenic number, since it is the product of 3 distinct primes.

181612017618 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 181612017618.

It is not an unprimeable number, because it can be changed into a prime (181612017619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15134334796 + ... + 15134334807.

It is an arithmetic number, because the mean of its divisors is an integer number (45403004406).

Almost surely, 2^181612017618 is an apocalyptic number.

181612017618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

181612017618 is a wasteful number, since it uses less digits than its factorization.

181612017618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30268669608.

The product of its (nonzero) digits is 32256, while the sum is 42.

The spelling of 181612017618 in words is "one hundred eighty-one billion, six hundred twelve million, seventeen thousand, six hundred eighteen".