181005552835129 has 16 divisors (see below), whose sum is σ = 204158432433600. Its totient is φ = 159028673578560.

The previous prime is 181005552835091. The next prime is 181005552835139. The reversal of 181005552835129 is 921538255500181.

It is a happy number.

It is not a de Polignac number, because 181005552835129 - 2⁴³ = 172209459812921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181005552835129.

It is not an unprimeable number, because it can be changed into a prime (181005552835139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1492325559 + ... + 1492446844.

It is an arithmetic number, because the mean of its divisors is an integer number (12759902027100).

Almost surely, 2^{181005552835129} is an apocalyptic number.

It is an amenable number.

181005552835129 is a deficient number, since it is larger than the sum of its proper divisors (23152879598471).

181005552835129 is a wasteful number, since it uses less digits than its factorization.

181005552835129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984772600.

The product of its (nonzero) digits is 4320000, while the sum is 55.

The spelling of 181005552835129 in words is "one hundred eighty-one trillion, five billion, five hundred fifty-two million, eight hundred thirty-five thousand, one hundred twenty-nine".