12135542913 has 48 divisors (see below), whose sum is σ = 19549530000. Its totient is φ = 7202732544.

The previous prime is 12135542899. The next prime is 12135542921. The reversal of 12135542913 is 31924553121.

It is a happy number.

12135542913 is a `hidden beast` number, since 1 + 2 + 13 + 554 + 2 + 91 + 3 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 82137969 + 12053404944 = 9063^2 + 109788^2 .

It is not a de Polignac number, because 12135542913 - 2⁴ = 12135542897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12135542983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5254603 + ... + 5256911.

It is an arithmetic number, because the mean of its divisors is an integer number (407281875).

Almost surely, 2^12135542913 is an apocalyptic number.

12135542913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12135542913 is a deficient number, since it is larger than the sum of its proper divisors (7413987087).

12135542913 is a wasteful number, since it uses less digits than its factorization.

12135542913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906 (or 3903 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The spelling of 12135542913 in words is "twelve billion, one hundred thirty-five million, five hundred forty-two thousand, nine hundred thirteen".