561100623 has 8 divisors (see below), whose sum is σ = 792142128. Its totient is φ = 352063104.

The previous prime is 561100591. The next prime is 561100627. The reversal of 561100623 is 326001165.

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

It is not a de Polignac number, because 561100623 - 2⁵ = 561100591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561100593 and 561100602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561100627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5500936 + ... + 5501037.

It is an arithmetic number, because the mean of its divisors is an integer number (99017766).

Almost surely, 2^561100623 is an apocalyptic number.

561100623 is a deficient number, since it is larger than the sum of its proper divisors (231041505).

561100623 is a wasteful number, since it uses less digits than its factorization.

561100623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001993.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 561100623 is about 23687.5626226085. The cubic root of 561100623 is about 824.7967043618.

Adding to 561100623 its reverse (326001165), we get a palindrome (887101788).

The spelling of 561100623 in words is "five hundred sixty-one million, one hundred thousand, six hundred twenty-three".