12536434143 has 12 divisors (see below), whose sum is σ = 18223523448. Its totient is φ = 8304388560.

The previous prime is 12536434123. The next prime is 12536434147. The reversal of 12536434143 is 34143463521.

12536434143 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 643 + 4 + 1 + 4 + 3 = 666.

It is not a de Polignac number, because 12536434143 - 2²⁰ = 12535385567 is a prime.

It is a super-2 number, since 2×12536434143² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12536434098 and 12536434107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12536434147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4434693 + ... + 4437518.

It is an arithmetic number, because the mean of its divisors is an integer number (1518626954).

Almost surely, 2^12536434143 is an apocalyptic number.

12536434143 is a deficient number, since it is larger than the sum of its proper divisors (5687089305).

12536434143 is a wasteful number, since it uses less digits than its factorization.

12536434143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872374 (or 8872371 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 12536434143 its reverse (34143463521), we get a palindrome (46679897664).

The spelling of 12536434143 in words is "twelve billion, five hundred thirty-six million, four hundred thirty-four thousand, one hundred forty-three".