5561366413 has 4 divisors (see below), whose sum is σ = 5562787968. Its totient is φ = 5559944860.

The previous prime is 5561366357. The next prime is 5561366441. The reversal of 5561366413 is 3146631655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3146631655 = 5 ⋅629326331.

It is a cyclic number.

It is not a de Polignac number, because 5561366413 - 2¹³ = 5561358221 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561361413) 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, 704893 + ... + 712738.

It is an arithmetic number, because the mean of its divisors is an integer number (1390696992).

Almost surely, 2^5561366413 is an apocalyptic number.

It is an amenable number.

5561366413 is a deficient number, since it is larger than the sum of its proper divisors (1421555).

5561366413 is a wasteful number, since it uses less digits than its factorization.

5561366413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421554.

The product of its digits is 194400, while the sum is 40.

The square root of 5561366413 is about 74574.5694791462. The cubic root of 5561366413 is about 1771.7148958843.

The spelling of 5561366413 in words is "five billion, five hundred sixty-one million, three hundred sixty-six thousand, four hundred thirteen".