12781912050 has 48 divisors (see below), whose sum is σ = 35221272480. Its totient is φ = 3408509520.

The previous prime is 12781912019. The next prime is 12781912097. The reversal of 12781912050 is 5021918721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12781911996 and 12781912014.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4732692 + ... + 4735391.

It is an arithmetic number, because the mean of its divisors is an integer number (733776510).

Almost surely, 2^12781912050 is an apocalyptic number.

12781912050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12781912050 is an abundant number, since it is smaller than the sum of its proper divisors (22439360430).

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

12781912050 is a wasteful number, since it uses less digits than its factorization.

12781912050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468104 (or 9468093 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 12781912050 in words is "twelve billion, seven hundred eighty-one million, nine hundred twelve thousand, fifty".