499999998186 has 48 divisors (see below), whose sum is σ = 1166733031464. Its totient is φ = 153837401472.

The previous prime is 499999998167. The next prime is 499999998191. The reversal of 499999998186 is 681899999994.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 405729506961 + 94270491225 = 636969^2 + 307035^2 .

It is a junction number, because it is equal to n+sod(n) for n = 499999998096 and 499999998105.

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, 4938060 + ... + 5038296.

Almost surely, 2^499999998186 is an apocalyptic number.

499999998186 is an abundant number, since it is smaller than the sum of its proper divisors (666733033278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

499999998186 is a wasteful number, since it uses less digits than its factorization.

499999998186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121575 (or 121572 counting only the distinct ones).

The product of its digits is 7346640384, while the sum is 90.

The spelling of 499999998186 in words is "four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, one hundred eighty-six".