12840668931 has 8 divisors (see below), whose sum is σ = 17313261840. Its totient is φ = 8464260992.

The previous prime is 12840668879. The next prime is 12840668933. The reversal of 12840668931 is 13986604821.

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 12840668931 - 2¹³ = 12840660739 is a prime.

It is a super-2 number, since 2×12840668931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12840668933) 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, 24045930 + ... + 24046463.

It is an arithmetic number, because the mean of its divisors is an integer number (2164157730).

Almost surely, 2^12840668931 is an apocalyptic number.

12840668931 is a deficient number, since it is larger than the sum of its proper divisors (4472592909).

12840668931 is an equidigital number, since it uses as much as digits as its factorization.

12840668931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48092485.

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 12840668931 in words is "twelve billion, eight hundred forty million, six hundred sixty-eight thousand, nine hundred thirty-one".