998042139399901 has 8 divisors (see below), whose sum is σ = 1025389120151000. Its totient is φ = 970714783326528.

The previous prime is 998042139399869. The next prime is 998042139399917. The reversal of 998042139399901 is 109993931240899.

It can be written as a sum of positive squares in 4 ways, for example, as 10578762755001 + 987463376644900 = 3252501^2 + 31423930^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 998042139399901 - 2⁵ = 998042139399869 is a prime.

It is a super-2 number, since 2×998042139399901² (a number of 31 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 (998042139394901) 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, 4906066326 + ... + 4906269751.

It is an arithmetic number, because the mean of its divisors is an integer number (128173640018875).

Almost surely, 2^{998042139399901} is an apocalyptic number.

It is an amenable number.

998042139399901 is a deficient number, since it is larger than the sum of its proper divisors (27346980751099).

998042139399901 is a wasteful number, since it uses less digits than its factorization.

998042139399901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9812338863.

The product of its (nonzero) digits is 306110016, while the sum is 76.

The spelling of 998042139399901 in words is "nine hundred ninety-eight trillion, forty-two billion, one hundred thirty-nine million, three hundred ninety-nine thousand, nine hundred one".