12705607755 has 20 divisors (see below), whose sum is σ = 22775979072. Its totient is φ = 6776323920.

The previous prime is 12705607729. The next prime is 12705607829. The reversal of 12705607755 is 55770650721.

It is a happy number.

12705607755 is a `hidden beast` number, since 12 + 7 + 0 + 560 + 7 + 75 + 5 = 666.

It is not a de Polignac number, because 12705607755 - 2¹⁶ = 12705542219 is a prime.

It is a super-2 number, since 2×12705607755² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12705607755.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15685531 + ... + 15686340.

Almost surely, 2^12705607755 is an apocalyptic number.

12705607755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12705607755 is a deficient number, since it is larger than the sum of its proper divisors (10070371317).

12705607755 is an equidigital number, since it uses as much as digits as its factorization.

12705607755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31371888 (or 31371879 counting only the distinct ones).

The product of its (nonzero) digits is 514500, while the sum is 45.

The spelling of 12705607755 in words is "twelve billion, seven hundred five million, six hundred seven thousand, seven hundred fifty-five".