23724612561 has 16 divisors (see below), whose sum is σ = 35859064640. Its totient is φ = 13831352640.

The previous prime is 23724612517. The next prime is 23724612563. The reversal of 23724612561 is 16521642732.

It is not a de Polignac number, because 23724612561 - 2⁷ = 23724612433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23724612563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16007770 + ... + 16009251.

It is an arithmetic number, because the mean of its divisors is an integer number (2241191540).

Almost surely, 2^23724612561 is an apocalyptic number.

It is an amenable number.

23724612561 is a deficient number, since it is larger than the sum of its proper divisors (12134452079).

23724612561 is a wasteful number, since it uses less digits than its factorization.

23724612561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32017056.

The product of its digits is 120960, while the sum is 39.

The spelling of 23724612561 in words is "twenty-three billion, seven hundred twenty-four million, six hundred twelve thousand, five hundred sixty-one".