561212160 has 144 divisors (see below), whose sum is σ = 1898025696. Its totient is φ = 140836864.

The previous prime is 561212159. The next prime is 561212203. The reversal of 561212160 is 61212165.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 561212160.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60982 + ... + 69578.

It is an arithmetic number, because the mean of its divisors is an integer number (13180734).

Almost surely, 2^561212160 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 561212160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949012848).

561212160 is an abundant number, since it is smaller than the sum of its proper divisors (1336813536).

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

561212160 is a wasteful number, since it uses less digits than its factorization.

561212160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638 (or 8624 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 561212160 is about 23689.9168424036. The cubic root of 561212160 is about 824.8513524655.

The spelling of 561212160 in words is "five hundred sixty-one million, two hundred twelve thousand, one hundred sixty".