9378138318739 has 4 divisors (see below), whose sum is σ = 9785883463056. Its totient is φ = 8970393174424.

The previous prime is 9378138318713. The next prime is 9378138318767.

It is a happy number.

9378138318739 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9378138318739 - 2⁵ = 9378138318707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9378138318239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203872572124 + ... + 203872572169.

It is an arithmetic number, because the mean of its divisors is an integer number (2446470865764).

Almost surely, 2^{9378138318739} is an apocalyptic number.

9378138318739 is a deficient number, since it is larger than the sum of its proper divisors (407745144317).

9378138318739 is a wasteful number, since it uses less digits than its factorization.

9378138318739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407745144316.

The product of its digits is 164602368, while the sum is 70.

The spelling of 9378138318739 in words is "nine trillion, three hundred seventy-eight billion, one hundred thirty-eight million, three hundred eighteen thousand, seven hundred thirty-nine".