12738443618278 has 32 divisors (see below), whose sum is σ = 22996717286400. Its totient is φ = 5169737939904.

The previous prime is 12738443618269. The next prime is 12738443618317. The reversal of 12738443618278 is 87281634483721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9861463 + ... + 11078146.

It is an arithmetic number, because the mean of its divisors is an integer number (718647415200).

Almost surely, 2^{12738443618278} is an apocalyptic number.

12738443618278 is a deficient number, since it is larger than the sum of its proper divisors (10258273668122).

12738443618278 is a wasteful number, since it uses less digits than its factorization.

12738443618278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20941924.

The product of its digits is 86704128, while the sum is 64.

The spelling of 12738443618278 in words is "twelve trillion, seven hundred thirty-eight billion, four hundred forty-three million, six hundred eighteen thousand, two hundred seventy-eight".