99555558 has 16 divisors (see below), whose sum is σ = 199413360. Its totient is φ = 33134816.

The previous prime is 99555499. The next prime is 99555559. The reversal of 99555558 is 85555599.

It is a super-3 number, since 3×99555558³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 99555558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99555559) 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, 8193 + ... + 16316.

It is an arithmetic number, because the mean of its divisors is an integer number (12463335).

Almost surely, 2^99555558 is an apocalyptic number.

99555558 is an abundant number, since it is smaller than the sum of its proper divisors (99857802).

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

99555558 is a wasteful number, since it uses less digits than its factorization.

99555558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25191.

The product of its digits is 2025000, while the sum is 51.

The square root of 99555558 is about 9977.7531538919. The cubic root of 99555558 is about 463.4702231115.

The spelling of 99555558 in words is "ninety-nine million, five hundred fifty-five thousand, five hundred fifty-eight".