84256918559 has 48 divisors (see below), whose sum is σ = 103749102720. Its totient is φ = 67653711360.

The previous prime is 84256918549. The next prime is 84256918591. The reversal of 84256918559 is 95581965248.

It is not a de Polignac number, because 84256918559 - 2⁸ = 84256918303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84256918549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6456389 + ... + 6469425.

It is an arithmetic number, because the mean of its divisors is an integer number (2161439640).

Almost surely, 2^84256918559 is an apocalyptic number.

84256918559 is a deficient number, since it is larger than the sum of its proper divisors (19492184161).

84256918559 is a wasteful number, since it uses less digits than its factorization.

84256918559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13208 (or 13191 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 62.

The spelling of 84256918559 in words is "eighty-four billion, two hundred fifty-six million, nine hundred eighteen thousand, five hundred fifty-nine".