12082381780 has 144 divisors (see below), whose sum is σ = 31325643216. Its totient is φ = 3889643520.

The previous prime is 12082381777. The next prime is 12082381807. The reversal of 12082381780 is 8718328021.

It can be written as a sum of positive squares in 8 ways, for example, as 1285509316 + 10796872464 = 35854^2 + 103908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12677784 + ... + 12678736.

It is an arithmetic number, because the mean of its divisors is an integer number (217539189).

Almost surely, 2^12082381780 is an apocalyptic number.

12082381780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12082381780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15662821608).

12082381780 is an abundant number, since it is smaller than the sum of its proper divisors (19243261436).

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

12082381780 is a wasteful number, since it uses less digits than its factorization.

12082381780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 12082381780 in words is "twelve billion, eighty-two million, three hundred eighty-one thousand, seven hundred eighty".