499999999999 has 4 divisors (see below), whose sum is σ = 500168409840. Its totient is φ = 499831590160.

The previous prime is 499999999979. The next prime is 500000000023. The reversal of 499999999999 is 999999999994.

It is a happy number.

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

It is a cyclic number.

It is a trimorphic number since its cube, 124999999999250000000001499999999999, ends in 499999999999.

It is not a de Polignac number, because 499999999999 - 2⁹ = 499999999487 is a prime.

It is a super-9 number, since 9×499999999999⁹ (a number of 107 digits) contains 999999999 as substring.

It is a Duffinian number.

499999999999 is a modest number, since divided by 999999 gives 499999 as remainder.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 499999999898 and 499999999907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499999999979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84200467 + ... + 84206404.

It is an arithmetic number, because the mean of its divisors is an integer number (125042102460).

Almost surely, 2^499999999999 is an apocalyptic number.

499999999999 is a deficient number, since it is larger than the sum of its proper divisors (168409841).

499999999999 is a wasteful number, since it uses less digits than its factorization.

499999999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168409840.

The product of its digits is 125524238436, while the sum is 103.

The spelling of 499999999999 in words is "four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".