12891156352 has 32 divisors (see below), whose sum is σ = 26102626200. Its totient is φ = 6339909120.

The previous prime is 12891156337. The next prime is 12891156401. The reversal of 12891156352 is 25365119821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 12891156299 and 12891156308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817702 + ... + 833317.

Almost surely, 2^12891156352 is an apocalyptic number.

It is an amenable number.

12891156352 is an abundant number, since it is smaller than the sum of its proper divisors (13211469848).

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

12891156352 is an equidigital number, since it uses as much as digits as its factorization.

12891156352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651094 (or 1651082 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The spelling of 12891156352 in words is "twelve billion, eight hundred ninety-one million, one hundred fifty-six thousand, three hundred fifty-two".