998446644899 has 4 divisors (see below), whose sum is σ = 1089214521720. Its totient is φ = 907678768080.

The previous prime is 998446644889. The next prime is 998446644919.

998446644899 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998446644899 - 2⁴ = 998446644883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998446644889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45383938394 + ... + 45383938415.

It is an arithmetic number, because the mean of its divisors is an integer number (272303630430).

Almost surely, 2^998446644899 is an apocalyptic number.

998446644899 is a deficient number, since it is larger than the sum of its proper divisors (90767876821).

998446644899 is a wasteful number, since it uses less digits than its factorization.

998446644899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90767876820.

The product of its digits is 3869835264, while the sum is 80.

The spelling of 998446644899 in words is "nine hundred ninety-eight billion, four hundred forty-six million, six hundred forty-four thousand, eight hundred ninety-nine".