12840370639 has 8 divisors (see below), whose sum is σ = 13517654000. Its totient is φ = 12163234752.

The previous prime is 12840370637. The next prime is 12840370643. The reversal of 12840370639 is 93607304821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12840370639 - 2¹ = 12840370637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12840370595 and 12840370604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840370637) 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 7 ways as a sum of consecutive naturals, for example, 172357 + ... + 235345.

It is an arithmetic number, because the mean of its divisors is an integer number (1689706750).

Almost surely, 2^12840370639 is an apocalyptic number.

12840370639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12840370639 is a deficient number, since it is larger than the sum of its proper divisors (677283361).

12840370639 is a wasteful number, since it uses less digits than its factorization.

12840370639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73737.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 12840370639 in words is "twelve billion, eight hundred forty million, three hundred seventy thousand, six hundred thirty-nine".