23830543557 has 6 divisors (see below), whose sum is σ = 34421896262. Its totient is φ = 15887029032.

The previous prime is 23830543537. The next prime is 23830543559. The reversal of 23830543557 is 75534503832.

23830543557 is a `hidden beast` number, since 23 + 8 + 30 + 5 + 43 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23154491556 + 676052001 = 152166^2 + 26001^2 .

It is not a de Polignac number, because 23830543557 - 2¹⁵ = 23830510789 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 (23830543559) 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 5 ways as a sum of consecutive naturals, for example, 1323919078 + ... + 1323919095.

Almost surely, 2^23830543557 is an apocalyptic number.

It is an amenable number.

23830543557 is a deficient number, since it is larger than the sum of its proper divisors (10591352705).

23830543557 is a wasteful number, since it uses less digits than its factorization.

23830543557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647838179 (or 2647838176 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

The spelling of 23830543557 in words is "twenty-three billion, eight hundred thirty million, five hundred forty-three thousand, five hundred fifty-seven".