23656642513 has 8 divisors (see below), whose sum is σ = 27039640320. Its totient is φ = 20274514080.

The previous prime is 23656642507. The next prime is 23656642543. The reversal of 23656642513 is 31524665632.

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

It is a cyclic number.

It is not a de Polignac number, because 23656642513 - 2⁵ = 23656642481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23656642513.

It is not an unprimeable number, because it can be changed into a prime (23656642543) 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 7 ways as a sum of consecutive naturals, for example, 157948 + ... + 268813.

It is an arithmetic number, because the mean of its divisors is an integer number (3379955040).

Almost surely, 2^23656642513 is an apocalyptic number.

It is an amenable number.

23656642513 is a deficient number, since it is larger than the sum of its proper divisors (3382997807).

23656642513 is an equidigital number, since it uses as much as digits as its factorization.

23656642513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434687.

The product of its digits is 777600, while the sum is 43.

The spelling of 23656642513 in words is "twenty-three billion, six hundred fifty-six million, six hundred forty-two thousand, five hundred thirteen".