999505505999 has 48 divisors (see below), whose sum is σ = 1397724451200. Its totient is φ = 702205640640.

The previous prime is 999505505983. The next prime is 999505506017.

999505505999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 999505505999 - 2⁴ = 999505505983 is a prime.

It is a super-2 number, since 2×999505505999² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999505505969) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1357349 + ... + 1959950.

It is an arithmetic number, because the mean of its divisors is an integer number (29119259400).

Almost surely, 2^999505505999 is an apocalyptic number.

999505505999 is a deficient number, since it is larger than the sum of its proper divisors (398218945201).

999505505999 is a wasteful number, since it uses less digits than its factorization.

999505505999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317380 (or 3317373 counting only the distinct ones).

The product of its (nonzero) digits is 332150625, while the sum is 74.

The spelling of 999505505999 in words is "nine hundred ninety-nine billion, five hundred five million, five hundred five thousand, nine hundred ninety-nine".