999355553999 has 4 divisors (see below), whose sum is σ = 1090206058920. Its totient is φ = 908505049080.

The previous prime is 999355553993. The next prime is 999355554007.

999355553999 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999355553999 - 2⁴ = 999355553983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999355553993) 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 3 ways as a sum of consecutive naturals, for example, 45425252444 + ... + 45425252465.

It is an arithmetic number, because the mean of its divisors is an integer number (272551514730).

Almost surely, 2^999355553999 is an apocalyptic number.

999355553999 is a deficient number, since it is larger than the sum of its proper divisors (90850504921).

999355553999 is a wasteful number, since it uses less digits than its factorization.

999355553999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90850504920.

The product of its digits is 2989355625, while the sum is 80.

The spelling of 999355553999 in words is "nine hundred ninety-nine billion, three hundred fifty-five million, five hundred fifty-three thousand, nine hundred ninety-nine".