999985000057 has 8 divisors (see below), whose sum is σ = 1032620640512. Its totient is φ = 967372988400.

The previous prime is 999985000043. The next prime is 999985000081. The reversal of 999985000057 is 750000589999.

It is a happy number.

999985000057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999985000057 - 2⁷ = 999984999929 is a prime.

It is the 999993-rd Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999984999959 and 999985000004.

It is not an unprimeable number, because it can be changed into a prime (999985300057) by changing a digit.

It is a nontrivial repunit in base 999992.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5821158 + ... + 5990479.

It is an arithmetic number, because the mean of its divisors is an integer number (129077580064).

Almost surely, 2^999985000057 is an apocalyptic number.

It is an amenable number.

999985000057 is a deficient number, since it is larger than the sum of its proper divisors (32635640455).

999985000057 is a wasteful number, since it uses less digits than its factorization.

999985000057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11814399.

The product of its (nonzero) digits is 9185400, while the sum is 61.

The spelling of 999985000057 in words is "nine hundred ninety-nine billion, nine hundred eighty-five million, fifty-seven", and thus it is an aban number.