12891740965 has 8 divisors (see below), whose sum is σ = 15524755488. Its totient is φ = 10276948560.

The previous prime is 12891740959. The next prime is 12891740989. The reversal of 12891740965 is 56904719821.

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

It is not a de Polignac number, because 12891740965 - 2¹⁵ = 12891708197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4553971 + ... + 4556800.

It is an arithmetic number, because the mean of its divisors is an integer number (1940594436).

Almost surely, 2^12891740965 is an apocalyptic number.

It is an amenable number.

12891740965 is a deficient number, since it is larger than the sum of its proper divisors (2633014523).

12891740965 is an equidigital number, since it uses as much as digits as its factorization.

12891740965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111059.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 12891740965 in words is "twelve billion, eight hundred ninety-one million, seven hundred forty thousand, nine hundred sixty-five".