7138887743887 has 4 divisors (see below), whose sum is σ = 7138990305720. Its totient is φ = 7138785182056.

The previous prime is 7138887743843. The next prime is 7138887743903. The reversal of 7138887743887 is 7883477888317.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138887743887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138887743837) 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, 51176437 + ... + 51315742.

It is an arithmetic number, because the mean of its divisors is an integer number (1784747576430).

Almost surely, 2^{7138887743887} is an apocalyptic number.

7138887743887 is a deficient number, since it is larger than the sum of its proper divisors (102561833).

7138887743887 is a wasteful number, since it uses less digits than its factorization.

7138887743887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102561832.

The product of its digits is 2832334848, while the sum is 79.

The spelling of 7138887743887 in words is "seven trillion, one hundred thirty-eight billion, eight hundred eighty-seven million, seven hundred forty-three thousand, eight hundred eighty-seven".