499999636500019 has 2 divisors, whose sum is σ = 499999636500020. Its totient is φ = 499999636500018.

The previous prime is 499999636499983. The next prime is 499999636500037. The reversal of 499999636500019 is 910005636999994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499999636500019 - 2¹⁹ = 499999635975731 is a prime.

It is a super-2 number, since 2×499999636500019² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (499999636530019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999818250009 + 249999818250010.

It is an arithmetic number, because the mean of its divisors is an integer number (249999818250010).

Almost surely, 2^{499999636500019} is an apocalyptic number.

499999636500019 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999636500019 is an equidigital number, since it uses as much as digits as its factorization.

499999636500019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1147912560, while the sum is 79.

The spelling of 499999636500019 in words is "four hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred thirty-six million, five hundred thousand, nineteen".