12535489943 has 4 divisors (see below), whose sum is σ = 12537229320. Its totient is φ = 12533750568.

The previous prime is 12535489927. The next prime is 12535489949. The reversal of 12535489943 is 34998453521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12535489943 - 2⁴ = 12535489927 is a prime.

It is a super-2 number, since 2×12535489943² (a number of 21 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 (12535489949) 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 3 ways as a sum of consecutive naturals, for example, 858833 + ... + 873306.

It is an arithmetic number, because the mean of its divisors is an integer number (3134307330).

Almost surely, 2^12535489943 is an apocalyptic number.

12535489943 is a deficient number, since it is larger than the sum of its proper divisors (1739377).

12535489943 is an equidigital number, since it uses as much as digits as its factorization.

12535489943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739376.

The product of its digits is 4665600, while the sum is 53.

The spelling of 12535489943 in words is "twelve billion, five hundred thirty-five million, four hundred eighty-nine thousand, nine hundred forty-three".