83805442138 has 8 divisors (see below), whose sum is σ = 137136178080. Its totient is φ = 38093382780.

The previous prime is 83805442057. The next prime is 83805442141. The reversal of 83805442138 is 83124450838.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×83805442138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1904669118 + ... + 1904669161.

It is an arithmetic number, because the mean of its divisors is an integer number (17142022260).

Almost surely, 2^83805442138 is an apocalyptic number.

83805442138 is a deficient number, since it is larger than the sum of its proper divisors (53330735942).

83805442138 is a wasteful number, since it uses less digits than its factorization.

83805442138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809338292.

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 83805442138 in words is "eighty-three billion, eight hundred five million, four hundred forty-two thousand, one hundred thirty-eight".