7042138678 has 4 divisors (see below), whose sum is σ = 10563208020. Its totient is φ = 3521069338.

The previous prime is 7042138657. The next prime is 7042138771. The reversal of 7042138678 is 8768312407.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760534668 + ... + 1760534671.

It is an arithmetic number, because the mean of its divisors is an integer number (2640802005).

Almost surely, 2^7042138678 is an apocalyptic number.

7042138678 is a deficient number, since it is larger than the sum of its proper divisors (3521069342).

7042138678 is a wasteful number, since it uses less digits than its factorization.

7042138678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521069341.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 7042138678 is about 83917.4515699804. The cubic root of 7042138678 is about 1916.7620009073.

The spelling of 7042138678 in words is "seven billion, forty-two million, one hundred thirty-eight thousand, six hundred seventy-eight".