99999888855 has 16 divisors (see below), whose sum is σ = 168420865920. Its totient is φ = 50526259488.

The previous prime is 99999888719. The next prime is 99999888929. The reversal of 99999888855 is 55888899999.

It is not a de Polignac number, because 99999888855 - 2¹¹ = 99999886807 is a prime.

It is a super-2 number, since 2×99999888855² (a number of 23 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175438117 + ... + 175438686.

It is an arithmetic number, because the mean of its divisors is an integer number (10526304120).

Almost surely, 2^99999888855 is an apocalyptic number.

99999888855 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99999888855 is a deficient number, since it is larger than the sum of its proper divisors (68420977065).

99999888855 is a wasteful number, since it uses less digits than its factorization.

99999888855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350876830.

The product of its digits is 6046617600, while the sum is 87.

The spelling of 99999888855 in words is "ninety-nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, eight hundred fifty-five".