23663308729 has 6 divisors (see below), whose sum is σ = 25137148334. Its totient is φ = 22271349120.

The previous prime is 23663308717. The next prime is 23663308759. The reversal of 23663308729 is 92780336632.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10429107129 + 13234201600 = 102123^2 + 115040^2 .

It is not a de Polignac number, because 23663308729 - 2³³ = 15073374137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663308759) 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 in 5 ways as a sum of consecutive naturals, for example, 40939692 + ... + 40940269.

Almost surely, 2^23663308729 is an apocalyptic number.

It is an amenable number.

23663308729 is a deficient number, since it is larger than the sum of its proper divisors (1473839605).

23663308729 is an equidigital number, since it uses as much as digits as its factorization.

23663308729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81879995 (or 81879978 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 23663308729 in words is "twenty-three billion, six hundred sixty-three million, three hundred eight thousand, seven hundred twenty-nine".