998888888865 has 16 divisors (see below), whose sum is σ = 1826539682688. Its totient is φ = 456634920576.

The previous prime is 998888888863. The next prime is 998888888873. The reversal of 998888888865 is 568888888899.

It is not a de Polignac number, because 998888888865 - 2¹ = 998888888863 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998888888863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4756613652 + ... + 4756613861.

It is an arithmetic number, because the mean of its divisors is an integer number (114158730168).

Almost surely, 2^998888888865 is an apocalyptic number.

It is an amenable number.

998888888865 is a deficient number, since it is larger than the sum of its proper divisors (827650793823).

998888888865 is a wasteful number, since it uses less digits than its factorization.

998888888865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513227528.

The product of its digits is 40768634880, while the sum is 93.

The spelling of 998888888865 in words is "nine hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-five".