561462660 has 144 divisors (see below), whose sum is σ = 1938867840. Its totient is φ = 130183680.

The previous prime is 561462647. The next prime is 561462691. The reversal of 561462660 is 66264165.

It is a happy number.

561462660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39376 + ... + 51704.

It is an arithmetic number, because the mean of its divisors is an integer number (13464360).

Almost surely, 2^561462660 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 561462660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969433920).

561462660 is an abundant number, since it is smaller than the sum of its proper divisors (1377405180).

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

561462660 is a wasteful number, since it uses less digits than its factorization.

561462660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378 (or 12373 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 561462660 is about 23695.2033120630. The cubic root of 561462660 is about 824.9740597904.

The spelling of 561462660 in words is "five hundred sixty-one million, four hundred sixty-two thousand, six hundred sixty".