23559457243391 has 4 divisors (see below), whose sum is σ = 23559703213800. Its totient is φ = 23559211272984.

The previous prime is 23559457243307. The next prime is 23559457243393. The reversal of 23559457243391 is 19334275495532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23559457243391 is a prime.

It is a super-2 number, since 2×23559457243391² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23559457243393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122841476 + ... + 123033113.

It is an arithmetic number, because the mean of its divisors is an integer number (5889925803450).

Almost surely, 2^{23559457243391} is an apocalyptic number.

23559457243391 is a deficient number, since it is larger than the sum of its proper divisors (245970409).

23559457243391 is an equidigital number, since it uses as much as digits as its factorization.

23559457243391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245970408.

The product of its digits is 122472000, while the sum is 62.

The spelling of 23559457243391 in words is "twenty-three trillion, five hundred fifty-nine billion, four hundred fifty-seven million, two hundred forty-three thousand, three hundred ninety-one".