42838056791 has 4 divisors (see below), whose sum is σ = 42853255800. Its totient is φ = 42822857784.

The previous prime is 42838056763. The next prime is 42838056829. The reversal of 42838056791 is 19765083824.

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 42838056791 - 2¹⁴ = 42838040407 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 (42838056731) by changing a digit.

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, 7595276 + ... + 7600913.

It is an arithmetic number, because the mean of its divisors is an integer number (10713313950).

It is a 1-persistent number, because it is pandigital, but 2⋅42838056791 = 85676113582 is not.

Almost surely, 2^42838056791 is an apocalyptic number.

42838056791 is a deficient number, since it is larger than the sum of its proper divisors (15199009).

42838056791 is a wasteful number, since it uses less digits than its factorization.

42838056791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15199008.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 42838056791 in words is "forty-two billion, eight hundred thirty-eight million, fifty-six thousand, seven hundred ninety-one".