499999999871985 has 32 divisors (see below), whose sum is σ = 825808112962560. Its totient is φ = 258063996825600.

The previous prime is 499999999871959. The next prime is 499999999871989. The reversal of 499999999871985 is 589178999999994.

It is not a de Polignac number, because 499999999871985 - 2⁶ = 499999999871921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499999999871989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359066761 + ... + 360456569.

It is an arithmetic number, because the mean of its divisors is an integer number (25806503530080).

Almost surely, 2^{499999999871985} is an apocalyptic number.

It is an amenable number.

499999999871985 is a deficient number, since it is larger than the sum of its proper divisors (325808113090575).

499999999871985 is a wasteful number, since it uses less digits than its factorization.

499999999871985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163529.

The product of its digits is 3471287581440, while the sum is 114.

The spelling of 499999999871985 in words is "four hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, eight hundred seventy-one thousand, nine hundred eighty-five".