12780943400 has 48 divisors (see below), whose sum is σ = 31463683740. Its totient is φ = 4811648000.

The previous prime is 12780943333. The next prime is 12780943403. The reversal of 12780943400 is 434908721.

It can be written as a sum of positive squares in 6 ways, for example, as 7279161124 + 5501782276 = 85318^2 + 74174^2 .

It is not an unprimeable number, because it can be changed into a prime (12780943403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1876151 + ... + 1882950.

Almost surely, 2^12780943400 is an apocalyptic number.

12780943400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12780943400 is an abundant number, since it is smaller than the sum of its proper divisors (18682740340).

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

12780943400 is a wasteful number, since it uses less digits than its factorization.

12780943400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759134 (or 3759125 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 12780943400 in words is "twelve billion, seven hundred eighty million, nine hundred forty-three thousand, four hundred".