23521660506613 has 16 divisors (see below), whose sum is σ = 25094817099520. Its totient is φ = 21983489289216.

The previous prime is 23521660506497. The next prime is 23521660506637. The reversal of 23521660506613 is 31660506612532.

It is not a de Polignac number, because 23521660506613 - 2²⁹ = 23521123635701 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 (23521660504613) 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 15 ways as a sum of consecutive naturals, for example, 19810845 + ... + 20964562.

It is an arithmetic number, because the mean of its divisors is an integer number (1568426068720).

Almost surely, 2^{23521660506613} is an apocalyptic number.

It is an amenable number.

23521660506613 is a deficient number, since it is larger than the sum of its proper divisors (1573156592907).

23521660506613 is a wasteful number, since it uses less digits than its factorization.

23521660506613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40775836.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 23521660506613 in words is "twenty-three trillion, five hundred twenty-one billion, six hundred sixty million, five hundred six thousand, six hundred thirteen".