561657162 has 64 divisors (see below), whose sum is σ = 1250536320. Its totient is φ = 166752000.

The previous prime is 561657143. The next prime is 561657193. The reversal of 561657162 is 261756165.

It is a self number, because there is not a number n which added to its sum of digits gives 561657162.

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, 726208 + ... + 726980.

It is an arithmetic number, because the mean of its divisors is an integer number (19539630).

Almost surely, 2^561657162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561657162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625268160).

561657162 is an abundant number, since it is smaller than the sum of its proper divisors (688879158).

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

561657162 is a wasteful number, since it uses less digits than its factorization.

561657162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999.

The product of its digits is 75600, while the sum is 39.

The square root of 561657162 is about 23699.3072050640. The cubic root of 561657162 is about 825.0693113484.

The spelling of 561657162 in words is "five hundred sixty-one million, six hundred fifty-seven thousand, one hundred sixty-two".