12155425533117 has 32 divisors (see below), whose sum is σ = 18021763872000. Its totient is φ = 8097442718976.

The previous prime is 12155425533091. The next prime is 12155425533169. The reversal of 12155425533117 is 71133552455121.

12155425533117 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 54 + 2 + 553 + 31 + 17 = 666.

It is not a de Polignac number, because 12155425533117 - 2¹⁴ = 12155425516733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155425537117) 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 31 ways as a sum of consecutive naturals, for example, 196968088 + ... + 197029790.

It is an arithmetic number, because the mean of its divisors is an integer number (563180121000).

Almost surely, 2^{12155425533117} is an apocalyptic number.

It is an amenable number.

12155425533117 is a deficient number, since it is larger than the sum of its proper divisors (5866338338883).

12155425533117 is a wasteful number, since it uses less digits than its factorization.

12155425533117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67154 (or 67148 counting only the distinct ones).

The product of its digits is 630000, while the sum is 45.

Adding to 12155425533117 its reverse (71133552455121), we get a palindrome (83288977988238).

The spelling of 12155425533117 in words is "twelve trillion, one hundred fifty-five billion, four hundred twenty-five million, five hundred thirty-three thousand, one hundred seventeen".