12781989348 has 24 divisors (see below), whose sum is σ = 29865020640. Its totient is φ = 4254894720.

The previous prime is 12781989281. The next prime is 12781989371. The reversal of 12781989348 is 84398918721.

It is a junction number, because it is equal to n+sod(n) for n = 12781989291 and 12781989300.

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, 711813 + ... + 729548.

It is an arithmetic number, because the mean of its divisors is an integer number (1244375860).

Almost surely, 2^12781989348 is an apocalyptic number.

It is an amenable number.

12781989348 is an abundant number, since it is smaller than the sum of its proper divisors (17083031292).

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

12781989348 is a wasteful number, since it uses less digits than its factorization.

12781989348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442107 (or 1442105 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 60.

The spelling of 12781989348 in words is "twelve billion, seven hundred eighty-one million, nine hundred eighty-nine thousand, three hundred forty-eight".