12705807733 has 4 divisors (see below), whose sum is σ = 13049207980. Its totient is φ = 12362407488.

The previous prime is 12705807721. The next prime is 12705807739. The reversal of 12705807733 is 33770850721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33770850721 = 167 ⋅202220663.

It can be written as a sum of positive squares in 2 ways, for example, as 10953296964 + 1752510769 = 104658^2 + 41863^2 .

It is a cyclic number.

It is not a de Polignac number, because 12705807733 - 2⁹ = 12705807221 is a prime.

It is a super-2 number, since 2×12705807733² (a number of 21 digits) contains 22 as substring.

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 12705807733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705807739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171700068 + ... + 171700141.

It is an arithmetic number, because the mean of its divisors is an integer number (3262301995).

Almost surely, 2^12705807733 is an apocalyptic number.

It is an amenable number.

12705807733 is a deficient number, since it is larger than the sum of its proper divisors (343400247).

12705807733 is an equidigital number, since it uses as much as digits as its factorization.

12705807733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343400246.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 12705807733 in words is "twelve billion, seven hundred five million, eight hundred seven thousand, seven hundred thirty-three".