181838363822 has 4 divisors (see below), whose sum is σ = 272757545736. Its totient is φ = 90919181910.

The previous prime is 181838363809. The next prime is 181838363869. The reversal of 181838363822 is 228363838181.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45459590954 + ... + 45459590957.

It is an arithmetic number, because the mean of its divisors is an integer number (68189386434).

Almost surely, 2^181838363822 is an apocalyptic number.

181838363822 is a deficient number, since it is larger than the sum of its proper divisors (90919181914).

181838363822 is an equidigital number, since it uses as much as digits as its factorization.

181838363822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90919181913.

The product of its digits is 2654208, while the sum is 53.

The spelling of 181838363822 in words is "one hundred eighty-one billion, eight hundred thirty-eight million, three hundred sixty-three thousand, eight hundred twenty-two".