561363623 has 4 divisors (see below), whose sum is σ = 566610120. Its totient is φ = 556117128.

The previous prime is 561363617. The next prime is 561363631. The reversal of 561363623 is 326363165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561363623 - 2¹² = 561359527 is a prime.

It is a super-2 number, since 2×561363623² = 630258234455372258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561366623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623088 + ... + 2623301.

It is an arithmetic number, because the mean of its divisors is an integer number (141652530).

Almost surely, 2^561363623 is an apocalyptic number.

561363623 is a deficient number, since it is larger than the sum of its proper divisors (5246497).

561363623 is a wasteful number, since it uses less digits than its factorization.

561363623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246496.

The product of its digits is 58320, while the sum is 35.

The square root of 561363623 is about 23693.1134087523. The cubic root of 561363623 is about 824.9255509188.

The spelling of 561363623 in words is "five hundred sixty-one million, three hundred sixty-three thousand, six hundred twenty-three".