123543533135 has 64 divisors (see below), whose sum is σ = 173020696704. Its totient is φ = 84387297280.

The previous prime is 123543533131. The next prime is 123543533143. The reversal of 123543533135 is 531335345321.

It is not a de Polignac number, because 123543533135 - 2² = 123543533131 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 (123543533131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76591589 + ... + 76593201.

It is an arithmetic number, because the mean of its divisors is an integer number (2703448386).

Almost surely, 2^123543533135 is an apocalyptic number.

123543533135 is a deficient number, since it is larger than the sum of its proper divisors (49477163569).

123543533135 is a wasteful number, since it uses less digits than its factorization.

123543533135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2323 counting only the distinct ones).

The product of its digits is 243000, while the sum is 38.

Adding to 123543533135 its reverse (531335345321), we get a palindrome (654878878456).

The spelling of 123543533135 in words is "one hundred twenty-three billion, five hundred forty-three million, five hundred thirty-three thousand, one hundred thirty-five".