998911629999 has 32 divisors (see below), whose sum is σ = 1566993205440. Its totient is φ = 626738881536.

The previous prime is 998911629997. The next prime is 998911630019. The reversal of 998911629999 is 999926119899.

It is a happy number.

It is not a de Polignac number, because 998911629999 - 2¹ = 998911629997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998911629997) 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 31 ways as a sum of consecutive naturals, for example, 14126259 + ... + 14196795.

It is an arithmetic number, because the mean of its divisors is an integer number (48968537670).

Almost surely, 2^998911629999 is an apocalyptic number.

998911629999 is a deficient number, since it is larger than the sum of its proper divisors (568081575441).

998911629999 is a wasteful number, since it uses less digits than its factorization.

998911629999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101416 (or 101410 counting only the distinct ones).

The product of its digits is 459165024, while the sum is 81.

The spelling of 998911629999 in words is "nine hundred ninety-eight billion, nine hundred eleven million, six hundred twenty-nine thousand, nine hundred ninety-nine".