561450580 has 48 divisors (see below), whose sum is σ = 1213719696. Its totient is φ = 218004480.

The previous prime is 561450577. The next prime is 561450581. The reversal of 561450580 is 85054165.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 44944 + 561405636 = 212^2 + 23694^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561450581) 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, 562642 + ... + 563638.

It is an arithmetic number, because the mean of its divisors is an integer number (25285827).

Almost surely, 2^561450580 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 561450580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (606859848).

561450580 is an abundant number, since it is smaller than the sum of its proper divisors (652269116).

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

561450580 is a wasteful number, since it uses less digits than its factorization.

561450580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 561450580 is about 23694.9484067807. The cubic root of 561450580 is about 824.9681432449.

The spelling of 561450580 in words is "five hundred sixty-one million, four hundred fifty thousand, five hundred eighty".