23305504661 has 2 divisors, whose sum is σ = 23305504662. Its totient is φ = 23305504660.

The previous prime is 23305504657. The next prime is 23305504669. The reversal of 23305504661 is 16640550332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23193462436 + 112042225 = 152294^2 + 10585^2 .

It is a cyclic number.

It is not a de Polignac number, because 23305504661 - 2² = 23305504657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23305504669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11652752330 + 11652752331.

It is an arithmetic number, because the mean of its divisors is an integer number (11652752331).

Almost surely, 2^23305504661 is an apocalyptic number.

It is an amenable number.

23305504661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305504661 is an equidigital number, since it uses as much as digits as its factorization.

23305504661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 23305504661 in words is "twenty-three billion, three hundred five million, five hundred four thousand, six hundred sixty-one".