998345448151 has 4 divisors (see below), whose sum is σ = 998347487704. Its totient is φ = 998343408600.

The previous prime is 998345448131. The next prime is 998345448173. The reversal of 998345448151 is 151844543899.

998345448151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 3-Lehmer number, since φ(998345448151) divides (998345448151-1)³.

It is a cyclic number.

It is not a de Polignac number, because 998345448151 - 2⁵ = 998345448119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998345448151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998345448131) 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, 203956 + ... + 1427686.

It is an arithmetic number, because the mean of its divisors is an integer number (249586871926).

Almost surely, 2^998345448151 is an apocalyptic number.

998345448151 is the 815821-st pentagonal number.

998345448151 is a deficient number, since it is larger than the sum of its proper divisors (2039553).

998345448151 is a wasteful number, since it uses less digits than its factorization.

998345448151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039552.

The product of its digits is 24883200, while the sum is 61.

The spelling of 998345448151 in words is "nine hundred ninety-eight billion, three hundred forty-five million, four hundred forty-eight thousand, one hundred fifty-one".