12605521267 has 8 divisors (see below), whose sum is σ = 13348107936. Its totient is φ = 11863055232.

The previous prime is 12605521237. The next prime is 12605521273. The reversal of 12605521267 is 76212550621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12605521267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12605521207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270973 + ... + 314065.

It is an arithmetic number, because the mean of its divisors is an integer number (1668513492).

Almost surely, 2^12605521267 is an apocalyptic number.

12605521267 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12605521267 is a deficient number, since it is larger than the sum of its proper divisors (742586669).

12605521267 is a wasteful number, since it uses less digits than its factorization.

12605521267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60317.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12605521267 in words is "twelve billion, six hundred five million, five hundred twenty-one thousand, two hundred sixty-seven".