181128429081 has 48 divisors (see below), whose sum is σ = 273099194368. Its totient is φ = 115552332000.

The previous prime is 181128429073. The next prime is 181128429103. The reversal of 181128429081 is 180924821181.

It is a happy number.

181128429081 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 284 + 290 + 81 = 666.

It is not a de Polignac number, because 181128429081 - 2³ = 181128429073 is a prime.

It is a super-2 number, since 2×181128429081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181128422081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10869606 + ... + 10886256.

Almost surely, 2^181128429081 is an apocalyptic number.

It is an amenable number.

181128429081 is a deficient number, since it is larger than the sum of its proper divisors (91970765287).

181128429081 is a wasteful number, since it uses less digits than its factorization.

181128429081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17122 (or 17119 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 181128429081 in words is "one hundred eighty-one billion, one hundred twenty-eight million, four hundred twenty-nine thousand, eighty-one".