12891693079987 has 8 divisors (see below), whose sum is σ = 13071617365856. Its totient is φ = 12712728390912.

The previous prime is 12891693079943. The next prime is 12891693080089. The reversal of 12891693079987 is 78997039619821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12891693079987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12891693179987) 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, 239872143 + ... + 239925880.

It is an arithmetic number, because the mean of its divisors is an integer number (1633952170732).

Almost surely, 2^{12891693079987} is an apocalyptic number.

12891693079987 is a deficient number, since it is larger than the sum of its proper divisors (179924285869).

12891693079987 is an equidigital number, since it uses as much as digits as its factorization.

12891693079987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479798397.

The product of its (nonzero) digits is 740710656, while the sum is 79.

The spelling of 12891693079987 in words is "twelve trillion, eight hundred ninety-one billion, six hundred ninety-three million, seventy-nine thousand, nine hundred eighty-seven".