23613178661 has 2 divisors, whose sum is σ = 23613178662. Its totient is φ = 23613178660.

The previous prime is 23613178639. The next prime is 23613178709. The reversal of 23613178661 is 16687131632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13854702436 + 9758476225 = 117706^2 + 98785^2 .

It is a cyclic number.

It is not a de Polignac number, because 23613178661 - 2¹⁴ = 23613162277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23613178601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11806589330 + 11806589331.

It is an arithmetic number, because the mean of its divisors is an integer number (11806589331).

Almost surely, 2^23613178661 is an apocalyptic number.

It is an amenable number.

23613178661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23613178661 is an equidigital number, since it uses as much as digits as its factorization.

23613178661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The spelling of 23613178661 in words is "twenty-three billion, six hundred thirteen million, one hundred seventy-eight thousand, six hundred sixty-one".