12781730680 has 16 divisors (see below), whose sum is σ = 28758894120. Its totient is φ = 5112692256.

The previous prime is 12781730671. The next prime is 12781730713. The reversal of 12781730680 is 8603718721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159771594 + ... + 159771673.

Almost surely, 2^12781730680 is an apocalyptic number.

12781730680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12781730680 is an abundant number, since it is smaller than the sum of its proper divisors (15977163440).

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

12781730680 is a wasteful number, since it uses less digits than its factorization.

12781730680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319543278 (or 319543274 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 12781730680 in words is "twelve billion, seven hundred eighty-one million, seven hundred thirty thousand, six hundred eighty".