12126783380 has 12 divisors (see below), whose sum is σ = 25466245140. Its totient is φ = 4850713344.

The previous prime is 12126783353. The next prime is 12126783397. The reversal of 12126783380 is 8338762121.

It can be written as a sum of positive squares in 2 ways, for example, as 4484177296 + 7642606084 = 66964^2 + 87422^2 .

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, 303169565 + ... + 303169604.

It is an arithmetic number, because the mean of its divisors is an integer number (2122187095).

Almost surely, 2^12126783380 is an apocalyptic number.

12126783380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12126783380 is an abundant number, since it is smaller than the sum of its proper divisors (13339461760).

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

12126783380 is a wasteful number, since it uses less digits than its factorization.

12126783380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606339178 (or 606339176 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 12126783380 in words is "twelve billion, one hundred twenty-six million, seven hundred eighty-three thousand, three hundred eighty".