998888871111111 has 12 divisors (see below), whose sum is σ = 1452029540881192. Its totient is φ = 661684347741456.

The previous prime is 998888871111049. The next prime is 998888871111133. The reversal of 998888871111111 is 111111178888899.

It is not a de Polignac number, because 998888871111111 - 2²² = 998888866916807 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 998888871111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998888871111191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 353463859561 + ... + 353463862386.

Almost surely, 2^{998888871111111} is an apocalyptic number.

998888871111111 is a deficient number, since it is larger than the sum of its proper divisors (453140669770081).

998888871111111 is a wasteful number, since it uses less digits than its factorization.

998888871111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706927722110 (or 706927722107 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 72.

The spelling of 998888871111111 in words is "nine hundred ninety-eight trillion, eight hundred eighty-eight billion, eight hundred seventy-one million, one hundred eleven thousand, one hundred eleven".