42838608081 has 4 divisors (see below), whose sum is σ = 57118144112. Its totient is φ = 28559072052.

The previous prime is 42838607993. The next prime is 42838608097. The reversal of 42838608081 is 18080683824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42838608081 - 2⁹ = 42838607569 is a prime.

It is a super-2 number, since 2×42838608081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42838608081.

It is not an unprimeable number, because it can be changed into a prime (42838608581) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7139768011 + ... + 7139768016.

It is an arithmetic number, because the mean of its divisors is an integer number (14279536028).

Almost surely, 2^42838608081 is an apocalyptic number.

It is an amenable number.

42838608081 is a deficient number, since it is larger than the sum of its proper divisors (14279536031).

42838608081 is a wasteful number, since it uses less digits than its factorization.

42838608081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14279536030.

The product of its (nonzero) digits is 589824, while the sum is 48.

The spelling of 42838608081 in words is "forty-two billion, eight hundred thirty-eight million, six hundred eight thousand, eighty-one".