12781485420 has 48 divisors (see below), whose sum is σ = 39041630208. Its totient is φ = 3098541760.

The previous prime is 12781485397. The next prime is 12781485443. The reversal of 12781485420 is 2458418721.

It is an interprime number because it is at equal distance from previous prime (12781485397) and next prime (12781485443).

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 15 ways as a sum of consecutive naturals, for example, 9682284 + ... + 9683603.

It is an arithmetic number, because the mean of its divisors is an integer number (813367296).

Almost surely, 2^12781485420 is an apocalyptic number.

12781485420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12781485420 is an abundant number, since it is smaller than the sum of its proper divisors (26260144788).

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

12781485420 is a wasteful number, since it uses less digits than its factorization.

12781485420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19365910 (or 19365908 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 12781485420 in words is "twelve billion, seven hundred eighty-one million, four hundred eighty-five thousand, four hundred twenty".