12381787406 has 8 divisors (see below), whose sum is σ = 18598878840. Its totient is φ = 6182161128.

The previous prime is 12381787357. The next prime is 12381787459. The reversal of 12381787406 is 60478718321.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4364516 + ... + 4367351.

It is an arithmetic number, because the mean of its divisors is an integer number (2324859855).

Almost surely, 2^12381787406 is an apocalyptic number.

12381787406 is a deficient number, since it is larger than the sum of its proper divisors (6217091434).

12381787406 is an equidigital number, since it uses as much as digits as its factorization.

12381787406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732578.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 12381787406 in words is "twelve billion, three hundred eighty-one million, seven hundred eighty-seven thousand, four hundred six".