12840109697 has 16 divisors (see below), whose sum is σ = 13839817728. Its totient is φ = 11877719040.

The previous prime is 12840109679. The next prime is 12840109703. The reversal of 12840109697 is 79690104821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12840109697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12840102697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244753 + ... + 1255025.

It is an arithmetic number, because the mean of its divisors is an integer number (864988608).

Almost surely, 2^12840109697 is an apocalyptic number.

It is an amenable number.

12840109697 is a deficient number, since it is larger than the sum of its proper divisors (999708031).

12840109697 is a wasteful number, since it uses less digits than its factorization.

12840109697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080.

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

The spelling of 12840109697 in words is "twelve billion, eight hundred forty million, one hundred nine thousand, six hundred ninety-seven".