23808857661 has 16 divisors (see below), whose sum is σ = 35288972800. Its totient is φ = 15865105824.

The previous prime is 23808857627. The next prime is 23808857669. The reversal of 23808857661 is 16675880832.

23808857661 is a `hidden beast` number, since 2 + 3 + 8 + 0 + 8 + 8 + 576 + 61 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-23808857661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23808857598 and 23808857607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23808857669) 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, 148621 + ... + 264018.

It is an arithmetic number, because the mean of its divisors is an integer number (2205560800).

Almost surely, 2^23808857661 is an apocalyptic number.

It is an amenable number.

23808857661 is a deficient number, since it is larger than the sum of its proper divisors (11480115139).

23808857661 is a wasteful number, since it uses less digits than its factorization.

23808857661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414785 (or 414779 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 23808857661 in words is "twenty-three billion, eight hundred eight million, eight hundred fifty-seven thousand, six hundred sixty-one".