99999404508 has 48 divisors (see below), whose sum is σ = 243777574656. Its totient is φ = 31844482560.

The previous prime is 99999404503. The next prime is 99999404509. The reversal of 99999404508 is 80540499999.

It is a super-2 number, since 2×99999404508² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999404503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460 + ... + 447212.

It is an arithmetic number, because the mean of its divisors is an integer number (5078699472).

Almost surely, 2^99999404508 is an apocalyptic number.

It is an amenable number.

99999404508 is an abundant number, since it is smaller than the sum of its proper divisors (143778170148).

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

99999404508 is a wasteful number, since it uses less digits than its factorization.

99999404508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447594 (or 447592 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 66.

The spelling of 99999404508 in words is "ninety-nine billion, nine hundred ninety-nine million, four hundred four thousand, five hundred eight".