99999999598 has 16 divisors (see below), whose sum is σ = 153516250800. Its totient is φ = 48828338496.

The previous prime is 99999999581. The next prime is 99999999599. The reversal of 99999999598 is 89599999999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999999599) 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, 383728 + ... + 589276.

It is an arithmetic number, because the mean of its divisors is an integer number (9594765675).

Almost surely, 2^99999999598 is an apocalyptic number.

99999999598 is a deficient number, since it is larger than the sum of its proper divisors (53516251202).

99999999598 is a wasteful number, since it uses less digits than its factorization.

99999999598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211251.

The product of its digits is 15496819560, while the sum is 94.

The spelling of 99999999598 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred ninety-eight".