999999999612899 has 2 divisors, whose sum is σ = 999999999612900. Its totient is φ = 999999999612898.

The previous prime is 999999999612893. The next prime is 999999999612919. The reversal of 999999999612899 is 998216999999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999999999612899 - 2⁴ = 999999999612883 is a prime.

It is not a weakly prime, because it can be changed into another prime (999999999612893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999999806449 + 499999999806450.

It is an arithmetic number, because the mean of its divisors is an integer number (499999999806450).

Almost surely, 2^{999999999612899} is an apocalyptic number.

999999999612899 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999999612899 is an equidigital number, since it uses as much as digits as its factorization.

999999999612899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3012581722464, while the sum is 116.

The spelling of 999999999612899 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, six hundred twelve thousand, eight hundred ninety-nine".