499999998155 has 24 divisors (see below), whose sum is σ = 702138634848. Its totient is φ = 340804076928.

The previous prime is 499999998133. The next prime is 499999998161. The reversal of 499999998155 is 551899999994.

It is not a de Polignac number, because 499999998155 - 2¹⁰ = 499999997131 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6069314 + ... + 6151143.

It is an arithmetic number, because the mean of its divisors is an integer number (29255776452).

Almost surely, 2^499999998155 is an apocalyptic number.

499999998155 is a deficient number, since it is larger than the sum of its proper divisors (202138636693).

499999998155 is a wasteful number, since it uses less digits than its factorization.

499999998155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220643 (or 12220636 counting only the distinct ones).

The product of its digits is 3826375200, while the sum is 86.

The spelling of 499999998155 in words is "four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred fifty-five".