561795612 has 96 divisors (see below), whose sum is σ = 1545922560. Its totient is φ = 155450880.

The previous prime is 561795599. The next prime is 561795613. The reversal of 561795612 is 216597165.

It is a super-2 number, since 2×561795612² = 631228619324909088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561795613) by changing a digit.

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, 540189 + ... + 541227.

It is an arithmetic number, because the mean of its divisors is an integer number (16103360).

Almost surely, 2^561795612 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 561795612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772961280).

561795612 is an abundant number, since it is smaller than the sum of its proper divisors (984126948).

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

561795612 is a wasteful number, since it uses less digits than its factorization.

561795612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1249 counting only the distinct ones).

The product of its digits is 113400, while the sum is 42.

The square root of 561795612 is about 23702.2279965407. The cubic root of 561795612 is about 825.1370997130.

The spelling of 561795612 in words is "five hundred sixty-one million, seven hundred ninety-five thousand, six hundred twelve".