12603634256405 has 8 divisors (see below), whose sum is σ = 15201134515512. Its totient is φ = 10031725133248.

The previous prime is 12603634256401. The next prime is 12603634256407. The reversal of 12603634256405 is 50465243630621.

It can be written as a sum of positive squares in 4 ways, for example, as 1193770389604 + 11409863866801 = 1092598^2 + 3377849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12603634256405 - 2² = 12603634256401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12603634256405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12603634256401) 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 7 ways as a sum of consecutive naturals, for example, 6397782902 + ... + 6397784871.

It is an arithmetic number, because the mean of its divisors is an integer number (1900141814439).

Almost surely, 2^{12603634256405} is an apocalyptic number.

It is an amenable number.

12603634256405 is a deficient number, since it is larger than the sum of its proper divisors (2597500259107).

12603634256405 is a wasteful number, since it uses less digits than its factorization.

12603634256405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12795567975.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 12603634256405 in words is "twelve trillion, six hundred three billion, six hundred thirty-four million, two hundred fifty-six thousand, four hundred five".