181838363823 has 12 divisors (see below), whose sum is σ = 264328380888. Its totient is φ = 120453437520.

The previous prime is 181838363809. The next prime is 181838363869. The reversal of 181838363823 is 328363838181.

181838363823 is a `hidden beast` number, since 1 + 8 + 183 + 83 + 6 + 382 + 3 = 666.

It is not a de Polignac number, because 181838363823 - 2²² = 181834169519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181838363823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181838364823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64343373 + ... + 64346198.

It is an arithmetic number, because the mean of its divisors is an integer number (22027365074).

Almost surely, 2^181838363823 is an apocalyptic number.

181838363823 is a deficient number, since it is larger than the sum of its proper divisors (82490017065).

181838363823 is a wasteful number, since it uses less digits than its factorization.

181838363823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128689734 (or 128689731 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 181838363823 in words is "one hundred eighty-one billion, eight hundred thirty-eight million, three hundred sixty-three thousand, eight hundred twenty-three".