12889954438 has 8 divisors (see below), whose sum is σ = 20472280632. Its totient is φ = 6065860896.

The previous prime is 12889954381. The next prime is 12889954457. The reversal of 12889954438 is 83445998821.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189558120 + ... + 189558187.

It is an arithmetic number, because the mean of its divisors is an integer number (2559035079).

Almost surely, 2^12889954438 is an apocalyptic number.

12889954438 is a deficient number, since it is larger than the sum of its proper divisors (7582326194).

12889954438 is a wasteful number, since it uses less digits than its factorization.

12889954438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379116326.

The product of its digits is 19906560, while the sum is 61.

The spelling of 12889954438 in words is "twelve billion, eight hundred eighty-nine million, nine hundred fifty-four thousand, four hundred thirty-eight".