23555137589 has 4 divisors (see below), whose sum is σ = 23555477760. Its totient is φ = 23554797420.

The previous prime is 23555137561. The next prime is 23555137597. The reversal of 23555137589 is 98573155532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23555137589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23555137589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555137289) 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, 24917 + ... + 218474.

It is an arithmetic number, because the mean of its divisors is an integer number (5888869440).

Almost surely, 2^23555137589 is an apocalyptic number.

It is an amenable number.

23555137589 is a deficient number, since it is larger than the sum of its proper divisors (340171).

23555137589 is an equidigital number, since it uses as much as digits as its factorization.

23555137589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340170.

The product of its digits is 5670000, while the sum is 53.

The spelling of 23555137589 in words is "twenty-three billion, five hundred fifty-five million, one hundred thirty-seven thousand, five hundred eighty-nine".