12378660643238 has 8 divisors (see below), whose sum is σ = 18572213855232. Its totient is φ = 6187922691496.

The previous prime is 12378660643211. The next prime is 12378660643247. The reversal of 12378660643238 is 83234606687321.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703804070 + ... + 703821657.

It is an arithmetic number, because the mean of its divisors is an integer number (2321526731904).

Almost surely, 2^{12378660643238} is an apocalyptic number.

12378660643238 is a deficient number, since it is larger than the sum of its proper divisors (6193553211994).

12378660643238 is a wasteful number, since it uses less digits than its factorization.

12378660643238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407630126.

The product of its (nonzero) digits is 41803776, while the sum is 59.

The spelling of 12378660643238 in words is "twelve trillion, three hundred seventy-eight billion, six hundred sixty million, six hundred forty-three thousand, two hundred thirty-eight".