12840717942 has 40 divisors (see below), whose sum is σ = 30986011056. Its totient is φ = 3950989488.

The previous prime is 12840717937. The next prime is 12840717949. The reversal of 12840717942 is 24971704821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840717949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3046498 + ... + 3050709.

Almost surely, 2^12840717942 is an apocalyptic number.

12840717942 is an abundant number, since it is smaller than the sum of its proper divisors (18145293114).

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

12840717942 is a wasteful number, since it uses less digits than its factorization.

12840717942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097234 (or 6097225 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 12840717942 in words is "twelve billion, eight hundred forty million, seven hundred seventeen thousand, nine hundred forty-two".