561226536 has 128 divisors (see below), whose sum is σ = 1687392000. Its totient is φ = 171811584.

The previous prime is 561226513. The next prime is 561226543. The reversal of 561226536 is 635622165.

It is a happy number.

561226536 is a `hidden beast` number, since 5 + 612 + 2 + 6 + 5 + 36 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 561226536.

It is an unprimeable number.

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, 754981 + ... + 755723.

It is an arithmetic number, because the mean of its divisors is an integer number (13182750).

Almost surely, 2^561226536 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 561226536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843696000).

561226536 is an abundant number, since it is smaller than the sum of its proper divisors (1126165464).

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

561226536 is a wasteful number, since it uses less digits than its factorization.

561226536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1030 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 561226536 is about 23690.2202606899. The cubic root of 561226536 is about 824.8583955309.

The spelling of 561226536 in words is "five hundred sixty-one million, two hundred twenty-six thousand, five hundred thirty-six".