561445501 has 8 divisors (see below), whose sum is σ = 564340608. Its totient is φ = 558558000.

The previous prime is 561445487. The next prime is 561445523. The reversal of 561445501 is 105544165.

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 561445501 - 2¹¹ = 561443453 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 (561445531) 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 7 ways as a sum of consecutive naturals, for example, 194811 + ... + 197671.

It is an arithmetic number, because the mean of its divisors is an integer number (70542576).

Almost surely, 2^561445501 is an apocalyptic number.

It is an amenable number.

561445501 is a deficient number, since it is larger than the sum of its proper divisors (2895107).

561445501 is a wasteful number, since it uses less digits than its factorization.

561445501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 561445501 is about 23694.8412317956. The cubic root of 561445501 is about 824.9656556257.

Adding to 561445501 its reverse (105544165), we get a palindrome (666989666).

It can be divided in two parts, 5614 and 45501, that added together give a palindrome (51115).

The spelling of 561445501 in words is "five hundred sixty-one million, four hundred forty-five thousand, five hundred one".