561818052 has 96 divisors (see below), whose sum is σ = 1496154240. Its totient is φ = 182252160.

The previous prime is 561818041. The next prime is 561818093. The reversal of 561818052 is 250818165.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 561817998 and 561818016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 704518 + ... + 705314.

It is an arithmetic number, because the mean of its divisors is an integer number (15584940).

Almost surely, 2^561818052 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 561818052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748077120).

561818052 is an abundant number, since it is smaller than the sum of its proper divisors (934336188).

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

561818052 is a wasteful number, since it uses less digits than its factorization.

561818052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 561818052 is about 23702.7013650343. The cubic root of 561818052 is about 825.1480858140.

The spelling of 561818052 in words is "five hundred sixty-one million, eight hundred eighteen thousand, fifty-two".