1998544620319 has 8 divisors (see below), whose sum is σ = 2152637201120. Its totient is φ = 1844503236576.

The previous prime is 1998544620311. The next prime is 1998544620377. The reversal of 1998544620319 is 9130264458991.

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

It is not a de Polignac number, because 1998544620319 - 2³ = 1998544620311 is a prime.

It is a super-2 number, since 2×1998544620319² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998544620311) 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, 12718164 + ... + 12874345.

It is an arithmetic number, because the mean of its divisors is an integer number (269079650140).

Almost surely, 2^{1998544620319} is an apocalyptic number.

1998544620319 is a deficient number, since it is larger than the sum of its proper divisors (154092580801).

1998544620319 is a wasteful number, since it uses less digits than its factorization.

1998544620319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25598529.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 1998544620319 in words is "one trillion, nine hundred ninety-eight billion, five hundred forty-four million, six hundred twenty thousand, three hundred nineteen".