12731608991 has 8 divisors (see below), whose sum is σ = 13344737280. Its totient is φ = 12123445752.

The previous prime is 12731608979. The next prime is 12731608999. The reversal of 12731608991 is 19980613721.

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 12731608991 - 2¹⁸ = 12731346847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731608999) 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, 1236011 + ... + 1246268.

It is an arithmetic number, because the mean of its divisors is an integer number (1668092160).

Almost surely, 2^12731608991 is an apocalyptic number.

12731608991 is a deficient number, since it is larger than the sum of its proper divisors (613128289).

12731608991 is a wasteful number, since it uses less digits than its factorization.

12731608991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482525.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 12731608991 in words is "twelve billion, seven hundred thirty-one million, six hundred eight thousand, nine hundred ninety-one".