12840971609 has 8 divisors (see below), whose sum is σ = 13585429440. Its totient is φ = 12103375536.

The previous prime is 12840971587. The next prime is 12840971617. The reversal of 12840971609 is 90617904821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12840971609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12840971629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711589 + ... + 1719074.

It is an arithmetic number, because the mean of its divisors is an integer number (1698178680).

Almost surely, 2^12840971609 is an apocalyptic number.

12840971609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12840971609 is a deficient number, since it is larger than the sum of its proper divisors (744457831).

12840971609 is a wasteful number, since it uses less digits than its factorization.

12840971609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430879.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 12840971609 in words is "twelve billion, eight hundred forty million, nine hundred seventy-one thousand, six hundred nine".