999998555211110 has 64 divisors (see below), whose sum is σ = 2215439137787904. Its totient is φ = 316474813065600.

The previous prime is 999998555211031. The next prime is 999998555211119. The reversal of 999998555211110 is 11112555899999.

It is a super-2 number, since 2×999998555211110² (a number of 31 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998555211119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20675165 + ... + 49269255.

It is an arithmetic number, because the mean of its divisors is an integer number (34616236527936).

Almost surely, 2^{999998555211110} is an apocalyptic number.

999998555211110 is an abundant number, since it is smaller than the sum of its proper divisors (1215440582576794).

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

999998555211110 is a wasteful number, since it uses less digits than its factorization.

999998555211110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28632549.

The product of its (nonzero) digits is 118098000, while the sum is 74.

The spelling of 999998555211110 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, five hundred fifty-five million, two hundred eleven thousand, one hundred ten".