12180653955 has 24 divisors (see below), whose sum is σ = 21115811808. Its totient is φ = 6495524736.

The previous prime is 12180653939. The next prime is 12180653957. The reversal of 12180653955 is 55935608121.

12180653955 is a `hidden beast` number, since 121 + 80 + 65 + 395 + 5 = 666.

It is a Cunningham number, because it is equal to 110366²-1.

It is not a de Polignac number, because 12180653955 - 2⁴ = 12180653939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12180653955.

It is not an unprimeable number, because it can be changed into a prime (12180653957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540799 + ... + 562871.

It is an arithmetic number, because the mean of its divisors is an integer number (879825492).

Almost surely, 2^12180653955 is an apocalyptic number.

12180653955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12180653955 is a deficient number, since it is larger than the sum of its proper divisors (8935157853).

12180653955 is a wasteful number, since it uses less digits than its factorization.

12180653955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34347 (or 34344 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 12180653955 in words is "twelve billion, one hundred eighty million, six hundred fifty-three thousand, nine hundred fifty-five".