23723661613 has 8 divisors (see below), whose sum is σ = 25140298680. Its totient is φ = 22346929920.

The previous prime is 23723661601. The next prime is 23723661641. The reversal of 23723661613 is 31616632732.

It can be written as a sum of positive squares in 4 ways, for example, as 149744169 + 23573917444 = 12237^2 + 153538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23723661613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23723661713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9975120 + ... + 9977497.

It is an arithmetic number, because the mean of its divisors is an integer number (3142537335).

Almost surely, 2^23723661613 is an apocalyptic number.

It is an amenable number.

23723661613 is a deficient number, since it is larger than the sum of its proper divisors (1416637067).

23723661613 is a wasteful number, since it uses less digits than its factorization.

23723661613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19952687.

The product of its digits is 163296, while the sum is 40.

The spelling of 23723661613 in words is "twenty-three billion, seven hundred twenty-three million, six hundred sixty-one thousand, six hundred thirteen".