561134623 has 16 divisors (see below), whose sum is σ = 692884800. Its totient is φ = 452675328.

The previous prime is 561134557. The next prime is 561134647. The reversal of 561134623 is 326431165.

561134623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561134623 - 2⁹ = 561134111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561134423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42286 + ... + 53947.

It is an arithmetic number, because the mean of its divisors is an integer number (43305300).

Almost surely, 2^561134623 is an apocalyptic number.

561134623 is a deficient number, since it is larger than the sum of its proper divisors (131750177).

561134623 is an equidigital number, since it uses as much as digits as its factorization.

561134623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96271 (or 96257 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 561134623 is about 23688.2802879399. The cubic root of 561134623 is about 824.8133635969.

Adding to 561134623 its reverse (326431165), we get a palindrome (887565788).

The spelling of 561134623 in words is "five hundred sixty-one million, one hundred thirty-four thousand, six hundred twenty-three".