99999998549 has 16 divisors (see below), whose sum is σ = 110059713600. Its totient is φ = 90853527600.

The previous prime is 99999998513. The next prime is 99999998573. The reversal of 99999998549 is 94589999999.

It is not a de Polignac number, because 99999998549 - 2¹⁶ = 99999933013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999998509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2239259 + ... + 2283479.

It is an arithmetic number, because the mean of its divisors is an integer number (6878732100).

Almost surely, 2^99999998549 is an apocalyptic number.

It is an amenable number.

99999998549 is a deficient number, since it is larger than the sum of its proper divisors (10059715051).

99999998549 is a wasteful number, since it uses less digits than its factorization.

99999998549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45953 (or 45931 counting only the distinct ones).

The product of its digits is 6887475360, while the sum is 89.

The spelling of 99999998549 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, five hundred forty-nine".