83999956992 has 448 divisors, whose sum is σ = 278484787200. Its totient is φ = 21976842240.

The previous prime is 83999956991. The next prime is 83999957009. The reversal of 83999956992 is 29965999938.

It is a tau number, because it is divible by the number of its divisors (448).

It is not an unprimeable number, because it can be changed into a prime (83999956991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101326434 + ... + 101327262.

Almost surely, 2^83999956992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83999956992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139242393600).

83999956992 is an abundant number, since it is smaller than the sum of its proper divisors (194484830208).

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

83999956992 is a wasteful number, since it uses less digits than its factorization.

83999956992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 891 counting only the distinct ones).

The product of its digits is 765275040, while the sum is 78.

The spelling of 83999956992 in words is "eighty-three billion, nine hundred ninety-nine million, nine hundred fifty-six thousand, nine hundred ninety-two".