998499505915 has 4 divisors (see below), whose sum is σ = 1198199407104. Its totient is φ = 798799604728.

The previous prime is 998499505903. The next prime is 998499505919. The reversal of 998499505915 is 519505994899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998499505915 - 2²¹ = 998497408763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998499505919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99849950587 + ... + 99849950596.

It is an arithmetic number, because the mean of its divisors is an integer number (299549851776).

Almost surely, 2^998499505915 is an apocalyptic number.

998499505915 is a deficient number, since it is larger than the sum of its proper divisors (199699901189).

998499505915 is a wasteful number, since it uses less digits than its factorization.

998499505915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199699901188.

The product of its (nonzero) digits is 236196000, while the sum is 73.

The spelling of 998499505915 in words is "nine hundred ninety-eight billion, four hundred ninety-nine million, five hundred five thousand, nine hundred fifteen".