7845438542839 has 2 divisors, whose sum is σ = 7845438542840. Its totient is φ = 7845438542838.

The previous prime is 7845438542833. The next prime is 7845438542857. The reversal of 7845438542839 is 9382458345487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7845438542839 - 2³ = 7845438542831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7845438542831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3922719271419 + 3922719271420.

It is an arithmetic number, because the mean of its divisors is an integer number (3922719271420).

Almost surely, 2^{7845438542839} is an apocalyptic number.

7845438542839 is a deficient number, since it is larger than the sum of its proper divisors (1).

7845438542839 is an equidigital number, since it uses as much as digits as its factorization.

7845438542839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 928972800, while the sum is 70.

The spelling of 7845438542839 in words is "seven trillion, eight hundred forty-five billion, four hundred thirty-eight million, five hundred forty-two thousand, eight hundred thirty-nine".