12705558305 has 32 divisors (see below), whose sum is σ = 17678269440. Its totient is φ = 8669004480.

The previous prime is 12705558287. The next prime is 12705558323. The reversal of 12705558305 is 50385550721.

It is an interprime number because it is at equal distance from previous prime (12705558287) and next prime (12705558323).

It is not a de Polignac number, because 12705558305 - 2¹⁶ = 12705492769 is a prime.

It is a super-2 number, since 2×12705558305² (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 31 ways as a sum of consecutive naturals, for example, 48614 + ... + 166656.

It is an arithmetic number, because the mean of its divisors is an integer number (552445920).

Almost surely, 2^12705558305 is an apocalyptic number.

It is an amenable number.

12705558305 is a deficient number, since it is larger than the sum of its proper divisors (4972711135).

12705558305 is a wasteful number, since it uses less digits than its factorization.

12705558305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118181.

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 12705558305 in words is "twelve billion, seven hundred five million, five hundred fifty-eight thousand, three hundred five".