561622264 has 64 divisors (see below), whose sum is σ = 1238227200. Its totient is φ = 233798400.

The previous prime is 561622253. The next prime is 561622267. The reversal of 561622264 is 462226165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561622267) 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, 759607 + ... + 760345.

It is an arithmetic number, because the mean of its divisors is an integer number (19347300).

Almost surely, 2^561622264 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 561622264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619113600).

561622264 is an abundant number, since it is smaller than the sum of its proper divisors (676604936).

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

561622264 is a wasteful number, since it uses less digits than its factorization.

561622264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124 (or 1120 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 561622264 is about 23698.5709273787. The cubic root of 561622264 is about 825.0522227120.

The spelling of 561622264 in words is "five hundred sixty-one million, six hundred twenty-two thousand, two hundred sixty-four".