23463643561 has 2 divisors, whose sum is σ = 23463643562. Its totient is φ = 23463643560.

The previous prime is 23463643531. The next prime is 23463643649. The reversal of 23463643561 is 16534636432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15603757225 + 7859886336 = 124915^2 + 88656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23463643561 is a prime.

It is not a weakly prime, because it can be changed into another prime (23463643531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11731821780 + 11731821781.

It is an arithmetic number, because the mean of its divisors is an integer number (11731821781).

Almost surely, 2^23463643561 is an apocalyptic number.

It is an amenable number.

23463643561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23463643561 is an equidigital number, since it uses as much as digits as its factorization.

23463643561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 43.

The spelling of 23463643561 in words is "twenty-three billion, four hundred sixty-three million, six hundred forty-three thousand, five hundred sixty-one".