5551665544213 has 4 divisors (see below), whose sum is σ = 5552305957260. Its totient is φ = 5551025131168.

The previous prime is 5551665544211. The next prime is 5551665544219. The reversal of 5551665544213 is 3124455661555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3425545777329 + 2126119766884 = 1850823^2 + 1458122^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551665544213 - 2¹ = 5551665544211 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 (5551665544211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320193520 + ... + 320210857.

It is an arithmetic number, because the mean of its divisors is an integer number (1388076489315).

Almost surely, 2^{5551665544213} is an apocalyptic number.

It is an amenable number.

5551665544213 is a deficient number, since it is larger than the sum of its proper divisors (640413047).

5551665544213 is an equidigital number, since it uses as much as digits as its factorization.

5551665544213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640413046.

The product of its digits is 10800000, while the sum is 52.

The spelling of 5551665544213 in words is "five trillion, five hundred fifty-one billion, six hundred sixty-five million, five hundred forty-four thousand, two hundred thirteen".