12641451780 has 24 divisors (see below), whose sum is σ = 35396065152. Its totient is φ = 3371053792.

The previous prime is 12641451743. The next prime is 12641451847. The reversal of 12641451780 is 8715414621.

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, 105345372 + ... + 105345491.

It is an arithmetic number, because the mean of its divisors is an integer number (1474836048).

Almost surely, 2^12641451780 is an apocalyptic number.

12641451780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12641451780 is an abundant number, since it is smaller than the sum of its proper divisors (22754613372).

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

12641451780 is a wasteful number, since it uses less digits than its factorization.

12641451780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210690875 (or 210690873 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 12641451780 in words is "twelve billion, six hundred forty-one million, four hundred fifty-one thousand, seven hundred eighty".