12691107833 has 4 divisors (see below), whose sum is σ = 12816762468. Its totient is φ = 12565453200.

The previous prime is 12691107829. The next prime is 12691107839. The reversal of 12691107833 is 33870119621.

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 9613410304 + 3077697529 = 98048^2 + 55477^2 .

It is a cyclic number.

It is not a de Polignac number, because 12691107833 - 2² = 12691107829 is a prime.

It is a super-2 number, since 2×12691107833² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12691107839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62827166 + ... + 62827367.

It is an arithmetic number, because the mean of its divisors is an integer number (3204190617).

Almost surely, 2^12691107833 is an apocalyptic number.

It is an amenable number.

12691107833 is a deficient number, since it is larger than the sum of its proper divisors (125654635).

12691107833 is a wasteful number, since it uses less digits than its factorization.

12691107833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125654634.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 12691107833 in words is "twelve billion, six hundred ninety-one million, one hundred seven thousand, eight hundred thirty-three".