990999999017 has 32 divisors (see below), whose sum is σ = 1207293050880. Its totient is φ = 795060826560.

The previous prime is 990999998981. The next prime is 990999999019. The reversal of 990999999017 is 710999999099.

It is not a de Polignac number, because 990999999017 - 2²⁰ = 990998950441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990999999019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3080792 + ... + 3387222.

It is an arithmetic number, because the mean of its divisors is an integer number (37727907840).

Almost surely, 2^990999999017 is an apocalyptic number.

It is an amenable number.

990999999017 is a deficient number, since it is larger than the sum of its proper divisors (216293051863).

990999999017 is a wasteful number, since it uses less digits than its factorization.

990999999017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306893.

The product of its (nonzero) digits is 301327047, while the sum is 80.

The spelling of 990999999017 in words is "nine hundred ninety billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seventeen".