181382084446 has 4 divisors (see below), whose sum is σ = 272073126672. Its totient is φ = 90691042222.

The previous prime is 181382084441. The next prime is 181382084453. The reversal of 181382084446 is 644480283181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 181382084446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181382084441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45345521110 + ... + 45345521113.

It is an arithmetic number, because the mean of its divisors is an integer number (68018281668).

Almost surely, 2^181382084446 is an apocalyptic number.

181382084446 is a deficient number, since it is larger than the sum of its proper divisors (90691042226).

181382084446 is an equidigital number, since it uses as much as digits as its factorization.

181382084446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90691042225.

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 181382084446 in words is "one hundred eighty-one billion, three hundred eighty-two million, eighty-four thousand, four hundred forty-six".