12705389696 has 32 divisors (see below), whose sum is σ = 25367021580. Its totient is φ = 6338764800.

The previous prime is 12705389677. The next prime is 12705389713. The reversal of 12705389696 is 69698350721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12335212096 + 370177600 = 111064^2 + 19240^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×12705389696² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50105 + ... + 167096.

Almost surely, 2^12705389696 is an apocalyptic number.

12705389696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12705389696 is a deficient number, since it is larger than the sum of its proper divisors (12661631884).

12705389696 is an equidigital number, since it uses as much as digits as its factorization.

12705389696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217672 (or 217660 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 12705389696 in words is "twelve billion, seven hundred five million, three hundred eighty-nine thousand, six hundred ninety-six".