5561561001 has 8 divisors (see below), whose sum is σ = 7434777600. Its totient is φ = 3698025872.

The previous prime is 5561560973. The next prime is 5561561017. The reversal of 5561561001 is 1001651655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561561001 - 2⁶ = 5561560937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5561561001.

It is not an unprimeable number, because it can be changed into a prime (5561561021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2419026 + ... + 2421323.

It is an arithmetic number, because the mean of its divisors is an integer number (929347200).

Almost surely, 2^5561561001 is an apocalyptic number.

It is an amenable number.

5561561001 is a deficient number, since it is larger than the sum of its proper divisors (1873216599).

5561561001 is a wasteful number, since it uses less digits than its factorization.

5561561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840735.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 5561561001 is about 74575.8741215951. The cubic root of 5561561001 is about 1771.7355592976.

The spelling of 5561561001 in words is "five billion, five hundred sixty-one million, five hundred sixty-one thousand, one".