1998139288584 has 32 divisors (see below), whose sum is σ = 4995996001920. Its totient is φ = 665960058816.

The previous prime is 1998139288583. The next prime is 1998139288601. The reversal of 1998139288584 is 4858829318991.

It is not an unprimeable number, because it can be changed into a prime (1998139288583) 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, 5209104 + ... + 5579519.

It is an arithmetic number, because the mean of its divisors is an integer number (156124875060).

Almost surely, 2^{1998139288584} is an apocalyptic number.

It is an amenable number.

1998139288584 is an abundant number, since it is smaller than the sum of its proper divisors (2997856713336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1998139288584 is a wasteful number, since it uses less digits than its factorization.

1998139288584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10796349 (or 10796345 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 75.

The spelling of 1998139288584 in words is "one trillion, nine hundred ninety-eight billion, one hundred thirty-nine million, two hundred eighty-eight thousand, five hundred eighty-four".