12891437252 has 24 divisors (see below), whose sum is σ = 22720279680. Its totient is φ = 6400086560.

The previous prime is 12891437231. The next prime is 12891437261. The reversal of 12891437252 is 25273419821.

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, 312302 + ... + 351162.

It is an arithmetic number, because the mean of its divisors is an integer number (946678320).

Almost surely, 2^12891437252 is an apocalyptic number.

It is an amenable number.

12891437252 is a deficient number, since it is larger than the sum of its proper divisors (9828842428).

12891437252 is a wasteful number, since it uses less digits than its factorization.

12891437252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39451 (or 39449 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 12891437252 in words is "twelve billion, eight hundred ninety-one million, four hundred thirty-seven thousand, two hundred fifty-two".