999998855149323 has 8 divisors (see below), whose sum is σ = 1333375984840336. Its totient is φ = 666643814445600.

The previous prime is 999998855149313. The next prime is 999998855149361. The reversal of 999998855149323 is 323941558899999.

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

It is not a de Polignac number, because 999998855149323 - 2²² = 999998850955019 is a prime.

It is the 31622759-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999998855149313) by changing a digit.

It is a nontrivial repunit in base 31622758.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522141188 + ... + 5522322273.

It is an arithmetic number, because the mean of its divisors is an integer number (166671998105042).

Almost surely, 2^{999998855149323} is an apocalyptic number.

999998855149323 is a deficient number, since it is larger than the sum of its proper divisors (333377129691013).

999998855149323 is a wasteful number, since it uses less digits than its factorization.

999998855149323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044493645.

The product of its digits is 61222003200, while the sum is 93.

The spelling of 999998855149323 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, eight hundred fifty-five million, one hundred forty-nine thousand, three hundred twenty-three".