84173912892 has 72 divisors (see below), whose sum is σ = 215184977280. Its totient is φ = 27741127680.

The previous prime is 84173912873. The next prime is 84173912929. The reversal of 84173912892 is 29821937148.

It is a super-2 number, since 2×84173912892² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1638517 + ... + 1689107.

It is an arithmetic number, because the mean of its divisors is an integer number (2988680240).

Almost surely, 2^84173912892 is an apocalyptic number.

It is an amenable number.

84173912892 is an abundant number, since it is smaller than the sum of its proper divisors (131011064388).

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

84173912892 is a wasteful number, since it uses less digits than its factorization.

84173912892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51123 (or 51118 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 84173912892 in words is "eighty-four billion, one hundred seventy-three million, nine hundred twelve thousand, eight hundred ninety-two".