135241554123 has 16 divisors (see below), whose sum is σ = 215770001440. Its totient is φ = 83225571552.

The previous prime is 135241554121. The next prime is 135241554137. The reversal of 135241554123 is 321455142531.

135241554123 is a `hidden beast` number, since 1 + 3 + 52 + 41 + 5 + 541 + 23 = 666.

It is not a de Polignac number, because 135241554123 - 2¹ = 135241554121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135241554121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192651436 + ... + 192652137.

It is an arithmetic number, because the mean of its divisors is an integer number (13485625090).

Almost surely, 2^135241554123 is an apocalyptic number.

135241554123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135241554123 is a deficient number, since it is larger than the sum of its proper divisors (80528447317).

135241554123 is a wasteful number, since it uses less digits than its factorization.

135241554123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385303595 (or 385303589 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

Adding to 135241554123 its reverse (321455142531), we get a palindrome (456696696654).

The spelling of 135241554123 in words is "one hundred thirty-five billion, two hundred forty-one million, five hundred fifty-four thousand, one hundred twenty-three".