12778140136 has 16 divisors (see below), whose sum is σ = 23996399940. Its totient is φ = 6379100160.

The previous prime is 12778140131. The next prime is 12778140149. The reversal of 12778140136 is 63104187721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12770356036 + 7784100 = 113006^2 + 2790^2 .

It is not an unprimeable number, because it can be changed into a prime (12778140131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240791 + ... + 1251046.

Almost surely, 2^12778140136 is an apocalyptic number.

It is an amenable number.

12778140136 is a deficient number, since it is larger than the sum of its proper divisors (11218259804).

12778140136 is a wasteful number, since it uses less digits than its factorization.

12778140136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492484 (or 2492480 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 12778140136 in words is "twelve billion, seven hundred seventy-eight million, one hundred forty thousand, one hundred thirty-six".