9998415518 has 24 divisors (see below), whose sum is σ = 18560038608. Its totient is φ = 3955416192.

The previous prime is 9998415503. The next prime is 9998415563. The reversal of 9998415518 is 8155148999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2110571 + ... + 2115302.

It is an arithmetic number, because the mean of its divisors is an integer number (773334942).

Almost surely, 2^9998415518 is an apocalyptic number.

9998415518 is a deficient number, since it is larger than the sum of its proper divisors (8561623090).

9998415518 is a wasteful number, since it uses less digits than its factorization.

9998415518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225908 (or 4225895 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 59.

The square root of 9998415518 is about 99992.0772761522. The cubic root of 9998415518 is about 2154.3208952553.

The spelling of 9998415518 in words is "nine billion, nine hundred ninety-eight million, four hundred fifteen thousand, five hundred eighteen".