831136066129 has 4 divisors (see below), whose sum is σ = 851407677540. Its totient is φ = 810864454720.

The previous prime is 831136066109. The next prime is 831136066153. The reversal of 831136066129 is 921660631138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 390346299729 + 440789766400 = 624777^2 + 663920^2 .

It is a cyclic number.

It is not a de Polignac number, because 831136066129 - 2⁵ = 831136066097 is a prime.

It is a super-2 number, since 2×831136066129² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831136066109) 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 3 ways as a sum of consecutive naturals, for example, 10135805644 + ... + 10135805725.

It is an arithmetic number, because the mean of its divisors is an integer number (212851919385).

Almost surely, 2^831136066129 is an apocalyptic number.

It is an amenable number.

831136066129 is a deficient number, since it is larger than the sum of its proper divisors (20271611411).

831136066129 is a wasteful number, since it uses less digits than its factorization.

831136066129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20271611410.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 831136066129 in words is "eight hundred thirty-one billion, one hundred thirty-six million, sixty-six thousand, one hundred twenty-nine".