99859000861 has 8 divisors (see below), whose sum is σ = 101506672800. Its totient is φ = 98211672240.

The previous prime is 99859000859. The next prime is 99859000933. The reversal of 99859000861 is 16800095899.

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 99859000861 - 2¹ = 99859000859 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 (99859000261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537750 + ... + 699208.

It is an arithmetic number, because the mean of its divisors is an integer number (12688334100).

Almost surely, 2^99859000861 is an apocalyptic number.

It is an amenable number.

99859000861 is a deficient number, since it is larger than the sum of its proper divisors (1647671939).

99859000861 is a wasteful number, since it uses less digits than its factorization.

99859000861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171659.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 99859000861 in words is "ninety-nine billion, eight hundred fifty-nine million, eight hundred sixty-one", and thus it is an aban number.