999985000001 has 4 divisors (see below), whose sum is σ = 1076906923092. Its totient is φ = 923063076912.

The previous prime is 999984999971. The next prime is 999985000039. The reversal of 999985000001 is 100000589999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 466931688976 + 533053311025 = 683324^2 + 730105^2 .

It is a cyclic number.

It is not a de Polignac number, because 999985000001 - 2¹⁴ = 999984983617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999985000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38460961526 + ... + 38460961551.

It is an arithmetic number, because the mean of its divisors is an integer number (269226730773).

Almost surely, 2^999985000001 is an apocalyptic number.

It is an amenable number.

999985000001 is a deficient number, since it is larger than the sum of its proper divisors (76921923091).

999985000001 is a wasteful number, since it uses less digits than its factorization.

999985000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76921923090.

The product of its (nonzero) digits is 262440, while the sum is 50.

The spelling of 999985000001 in words is "nine hundred ninety-nine billion, nine hundred eighty-five million, one", and thus it is an aban number.