499999999999999 has 2 divisors, whose sum is σ = 500000000000000. Its totient is φ = 499999999999998.

The previous prime is 499999999999993. The next prime is 500000000000057. The reversal of 499999999999999 is 999999999999994.

It is a weak prime.

It is a cyclic number.

It is a trimorphic number since its cube, 124999999999999250000000000001499999999999999, ends in 499999999999999.

It is not a de Polignac number, because 499999999999999 - 2⁵ = 499999999999967 is a prime.

It is a super-9 number, since 9×499999999999999⁹ (a number of 134 digits) contains 999999999 as substring.

499999999999999 is a modest number, since divided by 99999999 gives 4999999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499999999999993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999999999999 + 250000000000000.

It is an arithmetic number, because the mean of its divisors is an integer number (250000000000000).

Almost surely, 2^{499999999999999} is an apocalyptic number.

499999999999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999999999999 is an equidigital number, since it uses as much as digits as its factorization.

499999999999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91507169819844, while the sum is 130.

The spelling of 499999999999999 in words is "four hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".