7138578877838 has 8 divisors (see below), whose sum is σ = 10707997888800. Its totient is φ = 3569246248240.

The previous prime is 7138578877819. The next prime is 7138578877873. The reversal of 7138578877838 is 8387788758317.

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

It is a super-3 number, since 3×7138578877838³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21388343 + ... + 21719538.

It is an arithmetic number, because the mean of its divisors is an integer number (1338499736100).

Almost surely, 2^{7138578877838} is an apocalyptic number.

7138578877838 is a deficient number, since it is larger than the sum of its proper divisors (3569419010962).

7138578877838 is a wasteful number, since it uses less digits than its factorization.

7138578877838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43190682.

The product of its digits is 3540418560, while the sum is 80.

The spelling of 7138578877838 in words is "seven trillion, one hundred thirty-eight billion, five hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred thirty-eight".