999999999999888 has 40 divisors (see below), whose sum is σ = 2653153153157568. Its totient is φ = 324324324323712.

The previous prime is 999999999999883. The next prime is 999999999999947. The reversal of 999999999999888 is 888999999999999.

It is a super-9 number, since 9×999999999999888⁹ (a number of 136 digits) contains 999999999 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (999999999999883) 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, 281531529756 + ... + 281531533307.

Almost surely, 2^{999999999999888} is an apocalyptic number.

It is an amenable number.

999999999999888 is an abundant number, since it is smaller than the sum of its proper divisors (1653153153157680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999999999888 is a wasteful number, since it uses less digits than its factorization.

999999999999888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563063063111 (or 563063063105 counting only the distinct ones).

The product of its digits is 144603922678272, while the sum is 132.

The spelling of 999999999999888 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-eight".