12378035891 has 8 divisors (see below), whose sum is σ = 13581706320. Its totient is φ = 11210296032.

The previous prime is 12378035863. The next prime is 12378035897. The reversal of 12378035891 is 19853087321.

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

It is a de Polignac number, because none of the positive numbers 2^k-12378035891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12378035897) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8981921 + ... + 8983298.

It is an arithmetic number, because the mean of its divisors is an integer number (1697713290).

Almost surely, 2^12378035891 is an apocalyptic number.

12378035891 is a deficient number, since it is larger than the sum of its proper divisors (1203670429).

12378035891 is a wasteful number, since it uses less digits than its factorization.

12378035891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17965285.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 12378035891 in words is "twelve billion, three hundred seventy-eight million, thirty-five thousand, eight hundred ninety-one".