998909783883 has 48 divisors (see below), whose sum is σ = 1578238421760. Its totient is φ = 603786321600.

The previous prime is 998909783881. The next prime is 998909783891. The reversal of 998909783883 is 388387909899.

998909783883 is a `hidden beast` number, since 99 + 89 + 0 + 9 + 78 + 388 + 3 = 666.

It is not a de Polignac number, because 998909783883 - 2¹ = 998909783881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998909783881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121532548 + ... + 121540766.

It is an arithmetic number, because the mean of its divisors is an integer number (32879967120).

Almost surely, 2^998909783883 is an apocalyptic number.

998909783883 is a deficient number, since it is larger than the sum of its proper divisors (579328637877).

998909783883 is a wasteful number, since it uses less digits than its factorization.

998909783883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11360 (or 11357 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 81.

The spelling of 998909783883 in words is "nine hundred ninety-eight billion, nine hundred nine million, seven hundred eighty-three thousand, eight hundred eighty-three".