998427818884814 has 8 divisors (see below), whose sum is σ = 1499914325792520. Its totient is φ = 498456376953976.

The previous prime is 998427818884789. The next prime is 998427818884817. The reversal of 998427818884814 is 418488818724899.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 998427818884814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998427818884817) 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, 378766242569 + ... + 378766245204.

It is an arithmetic number, because the mean of its divisors is an integer number (187489290724065).

Almost surely, 2^{998427818884814} is an apocalyptic number.

998427818884814 is a deficient number, since it is larger than the sum of its proper divisors (501486506907706).

998427818884814 is a wasteful number, since it uses less digits than its factorization.

998427818884814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757532488434.

The product of its digits is 19025362944, while the sum is 89.

The spelling of 998427818884814 in words is "nine hundred ninety-eight trillion, four hundred twenty-seven billion, eight hundred eighteen million, eight hundred eighty-four thousand, eight hundred fourteen".