999365563999 has 8 divisors (see below), whose sum is σ = 1154347389648. Its totient is φ = 855072140160.

The previous prime is 999365563991. The next prime is 999365564111.

999365563999 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999365563999 - 2³ = 999365563991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999365563991) 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 7 ways as a sum of consecutive naturals, for example, 2672100252 + ... + 2672100625.

It is an arithmetic number, because the mean of its divisors is an integer number (144293423706).

Almost surely, 2^999365563999 is an apocalyptic number.

999365563999 is a deficient number, since it is larger than the sum of its proper divisors (154981825649).

999365563999 is a wasteful number, since it uses less digits than its factorization.

999365563999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344200905.

The product of its digits is 4304672100, while the sum is 82.

The spelling of 999365563999 in words is "nine hundred ninety-nine billion, three hundred sixty-five million, five hundred sixty-three thousand, nine hundred ninety-nine".