83985558140 has 24 divisors (see below), whose sum is σ = 192403279152. Its totient is φ = 30540202880.

The previous prime is 83985558109. The next prime is 83985558157. The reversal of 83985558140 is 4185558938.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 190876049 + ... + 190876488.

It is an arithmetic number, because the mean of its divisors is an integer number (8016803298).

Almost surely, 2^83985558140 is an apocalyptic number.

It is an amenable number.

83985558140 is an abundant number, since it is smaller than the sum of its proper divisors (108417721012).

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

83985558140 is a wasteful number, since it uses less digits than its factorization.

83985558140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381752557 (or 381752555 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 56.

The spelling of 83985558140 in words is "eighty-three billion, nine hundred eighty-five million, five hundred fifty-eight thousand, one hundred forty".