561100624 has 40 divisors (see below), whose sum is σ = 1250812800. Its totient is φ = 238850688.

The previous prime is 561100591. The next prime is 561100627. The reversal of 561100624 is 426001165.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 33499.

It is an arithmetic number, because the mean of its divisors is an integer number (31270320).

Almost surely, 2^561100624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561100624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625406400).

561100624 is an abundant number, since it is smaller than the sum of its proper divisors (689712176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561100624 is a wasteful number, since it uses less digits than its factorization.

561100624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33787 (or 33781 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 561100624 is about 23687.5626437166. The cubic root of 561100624 is about 824.7967048518.

Adding to 561100624 its reverse (426001165), we get a palindrome (987101789).

The spelling of 561100624 in words is "five hundred sixty-one million, one hundred thousand, six hundred twenty-four".