12378338534 has 16 divisors (see below), whose sum is σ = 19011345408. Its totient is φ = 6041405832.

The previous prime is 12378338449. The next prime is 12378338543. The reversal of 12378338534 is 43583387321.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 93419 + ... + 182985.

It is an arithmetic number, because the mean of its divisors is an integer number (1188209088).

Almost surely, 2^12378338534 is an apocalyptic number.

12378338534 is a deficient number, since it is larger than the sum of its proper divisors (6633006874).

12378338534 is a wasteful number, since it uses less digits than its factorization.

12378338534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91219.

The product of its digits is 1451520, while the sum is 47.

The spelling of 12378338534 in words is "twelve billion, three hundred seventy-eight million, three hundred thirty-eight thousand, five hundred thirty-four".