12561065582 has 16 divisors (see below), whose sum is σ = 20297844000. Its totient is φ = 5795445792.

The previous prime is 12561065563. The next prime is 12561065591. The reversal of 12561065582 is 28556016521.

It is a congruent number.

It is an unprimeable number.

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, 2573 + ... + 158520.

It is an arithmetic number, because the mean of its divisors is an integer number (1268615250).

Almost surely, 2^12561065582 is an apocalyptic number.

12561065582 is a deficient number, since it is larger than the sum of its proper divisors (7736778418).

12561065582 is a wasteful number, since it uses less digits than its factorization.

12561065582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164107.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 12561065582 in words is "twelve billion, five hundred sixty-one million, sixty-five thousand, five hundred eighty-two".