999944553331 has 4 divisors (see below), whose sum is σ = 1058764821192. Its totient is φ = 941124285472.

The previous prime is 999944553323. The next prime is 999944553383. The reversal of 999944553331 is 133355449999.

999944553331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 999944553331 - 2³ = 999944553323 is a prime.

It is a super-2 number, since 2×999944553331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999942553331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29410133905 + ... + 29410133938.

It is an arithmetic number, because the mean of its divisors is an integer number (264691205298).

Almost surely, 2^999944553331 is an apocalyptic number.

999944553331 is a deficient number, since it is larger than the sum of its proper divisors (58820267861).

999944553331 is a wasteful number, since it uses less digits than its factorization.

999944553331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58820267860.

The product of its digits is 70858800, while the sum is 64.

The spelling of 999944553331 in words is "nine hundred ninety-nine billion, nine hundred forty-four million, five hundred fifty-three thousand, three hundred thirty-one".