561611396 has 12 divisors (see below), whose sum is σ = 989417100. Its totient is φ = 278920800.

The previous prime is 561611389. The next prime is 561611417. The reversal of 561611396 is 693116165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 277688896 + 283922500 = 16664^2 + 16850^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470555 + ... + 471746.

It is an arithmetic number, because the mean of its divisors is an integer number (82451425).

Almost surely, 2^561611396 is an apocalyptic number.

It is an amenable number.

561611396 is a deficient number, since it is larger than the sum of its proper divisors (427805704).

561611396 is a wasteful number, since it uses less digits than its factorization.

561611396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942454 (or 942452 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 561611396 is about 23698.3416297428. The cubic root of 561611396 is about 825.0469007925.

It can be divided in two parts, 5616 and 11396, that multiplied together give a palindrome (63999936).

The spelling of 561611396 in words is "five hundred sixty-one million, six hundred eleven thousand, three hundred ninety-six".