12641805426 has 16 divisors (see below), whose sum is σ = 25286905728. Its totient is φ = 4213386000.

The previous prime is 12641805419. The next prime is 12641805437. The reversal of 12641805426 is 62450814621.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85930 + ... + 180741.

It is an arithmetic number, because the mean of its divisors is an integer number (1580431608).

Almost surely, 2^12641805426 is an apocalyptic number.

12641805426 is an abundant number, since it is smaller than the sum of its proper divisors (12645100302).

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

12641805426 is a wasteful number, since it uses less digits than its factorization.

12641805426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274577.

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 12641805426 in words is "twelve billion, six hundred forty-one million, eight hundred five thousand, four hundred twenty-six".