499999999806 has 24 divisors (see below), whose sum is σ = 1084181725224. Its totient is φ = 166536144720.

The previous prime is 499999999799. The next prime is 499999999819. The reversal of 499999999806 is 608999999994.

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, 10853200 + ... + 10899171.

It is an arithmetic number, because the mean of its divisors is an integer number (45174238551).

Almost surely, 2^499999999806 is an apocalyptic number.

499999999806 is an abundant number, since it is smaller than the sum of its proper divisors (584181725418).

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

499999999806 is a wasteful number, since it uses less digits than its factorization.

499999999806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753656 (or 21753653 counting only the distinct ones).

The product of its (nonzero) digits is 8264970432, while the sum is 90.

The spelling of 499999999806 in words is "four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred six".