561613652023 has 2 divisors, whose sum is σ = 561613652024. Its totient is φ = 561613652022.

The previous prime is 561613652003. The next prime is 561613652063. The reversal of 561613652023 is 320256316165.

It is an a-pointer prime, because the next prime (561613652063) can be obtained adding 561613652023 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561613652023 is a prime.

It is a super-2 number, since 2×561613652023² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561613652003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280806826011 + 280806826012.

It is an arithmetic number, because the mean of its divisors is an integer number (280806826012).

Almost surely, 2^561613652023 is an apocalyptic number.

561613652023 is a deficient number, since it is larger than the sum of its proper divisors (1).

561613652023 is an equidigital number, since it uses as much as digits as its factorization.

561613652023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 40.

Adding to 561613652023 its reverse (320256316165), we get a palindrome (881869968188).

The spelling of 561613652023 in words is "five hundred sixty-one billion, six hundred thirteen million, six hundred fifty-two thousand, twenty-three".