12705734136 has 16 divisors (see below), whose sum is σ = 31764335400. Its totient is φ = 4235244704.

The previous prime is 12705734123. The next prime is 12705734137. The reversal of 12705734136 is 63143750721.

It is a super-2 number, since 2×12705734136² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12705734094 and 12705734103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705734137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264702771 + ... + 264702818.

Almost surely, 2^12705734136 is an apocalyptic number.

It is an amenable number.

12705734136 is an abundant number, since it is smaller than the sum of its proper divisors (19058601264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12705734136 is a wasteful number, since it uses less digits than its factorization.

12705734136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529405598 (or 529405594 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 12705734136 in words is "twelve billion, seven hundred five million, seven hundred thirty-four thousand, one hundred thirty-six".