990919000065 has 64 divisors (see below), whose sum is σ = 1685194689024. Its totient is φ = 495490265088.

The previous prime is 990919000063. The next prime is 990919000079. The reversal of 990919000065 is 560000919099.

It is a happy number.

It is not a de Polignac number, because 990919000065 - 2¹ = 990919000063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990918999978 and 990919000023.

It is not an unprimeable number, because it can be changed into a prime (990919000063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 149298927 + ... + 149305563.

It is an arithmetic number, because the mean of its divisors is an integer number (26331167016).

It is a Proth number, since it is equal to 472507 ⋅ 2²¹ + 1 and 472507 < 2²¹.

Almost surely, 2^990919000065 is an apocalyptic number.

It is an amenable number.

990919000065 is a deficient number, since it is larger than the sum of its proper divisors (694275688959).

990919000065 is a wasteful number, since it uses less digits than its factorization.

990919000065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8826.

The product of its (nonzero) digits is 196830, while the sum is 48.

The spelling of 990919000065 in words is "nine hundred ninety billion, nine hundred nineteen million, sixty-five", and thus it is an aban number.