5561001003 has 16 divisors (see below), whose sum is σ = 7491384576. Its totient is φ = 3669021600.

The previous prime is 5561001001. The next prime is 5561001023. The reversal of 5561001003 is 3001001655.

It is a happy number.

It is not a de Polignac number, because 5561001003 - 2¹ = 5561001001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5561001001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582676 + ... + 592142.

It is an arithmetic number, because the mean of its divisors is an integer number (468211536).

Almost surely, 2^5561001003 is an apocalyptic number.

5561001003 is a deficient number, since it is larger than the sum of its proper divisors (1930383573).

5561001003 is a wasteful number, since it uses less digits than its factorization.

5561001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11474.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 5561001003 is about 74572.1194750424. The cubic root of 5561001003 is about 1771.6760914808.

Adding to 5561001003 its reverse (3001001655), we get a palindrome (8562002658).

The spelling of 5561001003 in words is "five billion, five hundred sixty-one million, one thousand, three".