12780871394 has 24 divisors (see below), whose sum is σ = 19825125840. Its totient is φ = 6179474280.

The previous prime is 12780871373. The next prime is 12780871399. The reversal of 12780871394 is 49317808721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12780871399) 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, 4494137 + ... + 4496979.

It is an arithmetic number, because the mean of its divisors is an integer number (826046910).

Almost surely, 2^12780871394 is an apocalyptic number.

12780871394 is a deficient number, since it is larger than the sum of its proper divisors (7044254446).

12780871394 is a wasteful number, since it uses less digits than its factorization.

12780871394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 12780871394 in words is "twelve billion, seven hundred eighty million, eight hundred seventy-one thousand, three hundred ninety-four".