12545126646 has 64 divisors (see below), whose sum is σ = 28005868800. Its totient is φ = 3719753856.

The previous prime is 12545126639. The next prime is 12545126749. The reversal of 12545126646 is 64662154521.

It is a junction number, because it is equal to n+sod(n) for n = 12545126598 and 12545126607.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1232245 + ... + 1242383.

It is an arithmetic number, because the mean of its divisors is an integer number (437591700).

Almost surely, 2^12545126646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12545126646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14002934400).

12545126646 is an abundant number, since it is smaller than the sum of its proper divisors (15460742154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12545126646 is a wasteful number, since it uses less digits than its factorization.

12545126646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10733.

The product of its digits is 345600, while the sum is 42.

The spelling of 12545126646 in words is "twelve billion, five hundred forty-five million, one hundred twenty-six thousand, six hundred forty-six".