999099090915 has 16 divisors (see below), whose sum is σ = 1599912137376. Its totient is φ = 532401651200.

The previous prime is 999099090911. The next prime is 999099090919. The reversal of 999099090915 is 519090990999.

It is an interprime number because it is at equal distance from previous prime (999099090911) and next prime (999099090919).

It is not a de Polignac number, because 999099090915 - 2² = 999099090911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999099090915.

It is not an unprimeable number, because it can be changed into a prime (999099090911) 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 15 ways as a sum of consecutive naturals, for example, 28181526 + ... + 28216955.

It is an arithmetic number, because the mean of its divisors is an integer number (99994508586).

Almost surely, 2^999099090915 is an apocalyptic number.

999099090915 is a deficient number, since it is larger than the sum of its proper divisors (600813046461).

999099090915 is a wasteful number, since it uses less digits than its factorization.

999099090915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56399670.

The product of its (nonzero) digits is 23914845, while the sum is 69.

The spelling of 999099090915 in words is "nine hundred ninety-nine billion, ninety-nine million, ninety thousand, nine hundred fifteen".