12581447680 has 48 divisors (see below), whose sum is σ = 30188127060. Its totient is φ = 5032574976.

The previous prime is 12581447677. The next prime is 12581447687. The reversal of 12581447680 is 8674418521.

It can be written as a sum of positive squares in 2 ways, for example, as 12040233984 + 541213696 = 109728^2 + 23264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12581447680.

It is not an unprimeable number, because it can be changed into a prime (12581447687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604089 + ... + 624568.

Almost surely, 2^12581447680 is an apocalyptic number.

12581447680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12581447680 is an abundant number, since it is smaller than the sum of its proper divisors (17606679380).

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

12581447680 is an equidigital number, since it uses as much as digits as its factorization.

12581447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228684 (or 1228664 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 12581447680 in words is "twelve billion, five hundred eighty-one million, four hundred forty-seven thousand, six hundred eighty".