12135054553999 has 16 divisors (see below), whose sum is σ = 13172104360800. Its totient is φ = 11112852142080.

The previous prime is 12135054553961. The next prime is 12135054554009. The reversal of 12135054553999 is 99935545053121.

It is a happy number.

It is not a de Polignac number, because 12135054553999 - 2⁹ = 12135054553487 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 (12135054553099) 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, 4840639 + ... + 6906655.

It is an arithmetic number, because the mean of its divisors is an integer number (823256522550).

Almost surely, 2^{12135054553999} is an apocalyptic number.

12135054553999 is a deficient number, since it is larger than the sum of its proper divisors (1037049806801).

12135054553999 is a wasteful number, since it uses less digits than its factorization.

12135054553999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069610.

The product of its (nonzero) digits is 32805000, while the sum is 61.

The spelling of 12135054553999 in words is "twelve trillion, one hundred thirty-five billion, fifty-four million, five hundred fifty-three thousand, nine hundred ninety-nine".