128429765181 has 12 divisors (see below), whose sum is σ = 191493843840. Its totient is φ = 82857912840.

The previous prime is 128429765171. The next prime is 128429765183. The reversal of 128429765181 is 181567924821.

128429765181 is a `hidden beast` number, since 1 + 28 + 429 + 76 + 51 + 81 = 666.

It is not a de Polignac number, because 128429765181 - 2¹⁰ = 128429764157 is a prime.

It is a super-2 number, since 2×128429765181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128429765183) 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, 230160591 + ... + 230161148.

It is an arithmetic number, because the mean of its divisors is an integer number (15957820320).

Almost surely, 2^128429765181 is an apocalyptic number.

It is an amenable number.

128429765181 is a deficient number, since it is larger than the sum of its proper divisors (63064078659).

128429765181 is a wasteful number, since it uses less digits than its factorization.

128429765181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460321776 (or 460321773 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 128429765181 in words is "one hundred twenty-eight billion, four hundred twenty-nine million, seven hundred sixty-five thousand, one hundred eighty-one".