181863128183373 has 336 divisors, whose sum is σ = 345978464832000. Its totient is φ = 93504054758400.

The previous prime is 181863128183339. The next prime is 181863128183389. The reversal of 181863128183373 is 373381821368181.

181863128183373 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 63 + 1 + 28 + 183 + 373 = 666.

It is not a de Polignac number, because 181863128183373 - 2⁹ = 181863128182861 is a prime.

It is a super-2 number, since 2×181863128183373² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 181863128183373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181863128183393) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 66156102003 + ... + 66156104751.

It is an arithmetic number, because the mean of its divisors is an integer number (1029697812000).

Almost surely, 2^{181863128183373} is an apocalyptic number.

181863128183373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

181863128183373 is a deficient number, since it is larger than the sum of its proper divisors (164115336648627).

181863128183373 is a wasteful number, since it uses less digits than its factorization.

181863128183373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4712 (or 4684 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 181863128183373 in words is "one hundred eighty-one trillion, eight hundred sixty-three billion, one hundred twenty-eight million, one hundred eighty-three thousand, three hundred seventy-three".