12381787408 has 20 divisors (see below), whose sum is σ = 24036859980. Its totient is φ = 6178726784.

The previous prime is 12381787357. The next prime is 12381787459. The reversal of 12381787408 is 80478718321.

It is an interprime number because it is at equal distance from previous prime (12381787357) and next prime (12381787459).

It can be written as a sum of positive squares in 2 ways, for example, as 8946889744 + 3434897664 = 94588^2 + 58608^2 .

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, 752035 + ... + 768322.

It is an arithmetic number, because the mean of its divisors is an integer number (1201842999).

Almost surely, 2^12381787408 is an apocalyptic number.

It is an amenable number.

12381787408 is a deficient number, since it is larger than the sum of its proper divisors (11655072572).

12381787408 is a wasteful number, since it uses less digits than its factorization.

12381787408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520874 (or 1520868 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 12381787408 in words is "twelve billion, three hundred eighty-one million, seven hundred eighty-seven thousand, four hundred eight".