84758442138 has 96 divisors (see below), whose sum is σ = 197834337792. Its totient is φ = 26128396800.

The previous prime is 84758442089. The next prime is 84758442151. The reversal of 84758442138 is 83124485748.

84758442138 is a `hidden beast` number, since 8 + 4 + 7 + 584 + 4 + 21 + 38 = 666.

It is a super-2 number, since 2×84758442138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 26560123 + ... + 26563313.

It is an arithmetic number, because the mean of its divisors is an integer number (2060774352).

Almost surely, 2^84758442138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84758442138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98917168896).

84758442138 is an abundant number, since it is smaller than the sum of its proper divisors (113075895654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84758442138 is a wasteful number, since it uses less digits than its factorization.

84758442138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4697 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 54.

The spelling of 84758442138 in words is "eighty-four billion, seven hundred fifty-eight million, four hundred forty-two thousand, one hundred thirty-eight".