5998565944809 has 33 divisors (see below), whose sum is σ = 8998690939933. Its totient is φ = 3998647193292.

The previous prime is 5998565944769. The next prime is 5998565944817. The reversal of 5998565944809 is 9084495658995.

The square root of 5998565944809 is 2449197.

It is a perfect power (a square), and thus also a powerful number.

5998565944809 is a `hidden beast` number, since 5 + 9 + 9 + 8 + 565 + 9 + 4 + 48 + 0 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-5998565944809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5998565144809) 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 32 ways as a sum of consecutive naturals, for example, 595149832 + ... + 595159910.

Almost surely, 2^{5998565944809} is an apocalyptic number.

5998565944809 is the 2449197-th square number.

5998565944809 is the 1224599-th centered octagonal number.

It is an amenable number.

5998565944809 is a deficient number, since it is larger than the sum of its proper divisors (3000124995124).

5998565944809 is an frugal number, since it uses more digits than its factorization.

5998565944809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20188 (or 10082 counting only the distinct ones).

The product of its (nonzero) digits is 5038848000, while the sum is 81.

Multiplying 5998565944809 by its sum of digits (81), we get a square (485883841529529 = 22042773²).

5998565944809 divided by its sum of digits (81) gives a square (74056369689 = 272133²).

The spelling of 5998565944809 in words is "five trillion, nine hundred ninety-eight billion, five hundred sixty-five million, nine hundred forty-four thousand, eight hundred nine".