12840407636 has 24 divisors (see below), whose sum is σ = 25700242176. Its totient is φ = 5498868960.

The previous prime is 12840407617. The next prime is 12840407653. The reversal of 12840407636 is 63670404821.

12840407636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12840407593 and 12840407602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135635 + ... + 209946.

It is an arithmetic number, because the mean of its divisors is an integer number (1070843424).

Almost surely, 2^12840407636 is an apocalyptic number.

It is an amenable number.

12840407636 is an abundant number, since it is smaller than the sum of its proper divisors (12859834540).

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

12840407636 is a wasteful number, since it uses less digits than its factorization.

12840407636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346919 (or 346917 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 12840407636 in words is "twelve billion, eight hundred forty million, four hundred seven thousand, six hundred thirty-six".