12605446655 has 4 divisors (see below), whose sum is σ = 15126535992. Its totient is φ = 10084357320.

The previous prime is 12605446643. The next prime is 12605446663. The reversal of 12605446655 is 55664450621.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-12605446655 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1260544661 + ... + 1260544670.

It is an arithmetic number, because the mean of its divisors is an integer number (3781633998).

Almost surely, 2^12605446655 is an apocalyptic number.

12605446655 is a deficient number, since it is larger than the sum of its proper divisors (2521089337).

12605446655 is an equidigital number, since it uses as much as digits as its factorization.

12605446655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521089336.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 12605446655 in words is "twelve billion, six hundred five million, four hundred forty-six thousand, six hundred fifty-five".