561322608 has 160 divisors (see below), whose sum is σ = 1870594560. Its totient is φ = 140743680.

The previous prime is 561322591. The next prime is 561322631. The reversal of 561322608 is 806223165.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104566 + ... + 109802.

It is an arithmetic number, because the mean of its divisors is an integer number (11691216).

Almost surely, 2^561322608 is an apocalyptic number.

561322608 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561322608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935297280).

561322608 is an abundant number, since it is smaller than the sum of its proper divisors (1309271952).

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

561322608 is a wasteful number, since it uses less digits than its factorization.

561322608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295 (or 5289 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 561322608 is about 23692.2478460783. The cubic root of 561322608 is about 824.9054598737.

The spelling of 561322608 in words is "five hundred sixty-one million, three hundred twenty-two thousand, six hundred eight".