181840051005 has 16 divisors (see below), whose sum is σ = 292729018560. Its totient is φ = 96386381568.

The previous prime is 181840050991. The next prime is 181840051039. The reversal of 181840051005 is 500150048181.

It is not a de Polignac number, because 181840051005 - 2⁴ = 181840050989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37183660 + ... + 37188549.

It is an arithmetic number, because the mean of its divisors is an integer number (18295563660).

Almost surely, 2^181840051005 is an apocalyptic number.

181840051005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181840051005 is a deficient number, since it is larger than the sum of its proper divisors (110888967555).

181840051005 is a wasteful number, since it uses less digits than its factorization.

181840051005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74372380.

The product of its (nonzero) digits is 6400, while the sum is 33.

Adding to 181840051005 its reverse (500150048181), we get a palindrome (681990099186).

The spelling of 181840051005 in words is "one hundred eighty-one billion, eight hundred forty million, fifty-one thousand, five".