12180253499656 has 16 divisors (see below), whose sum is σ = 24914154885840. Its totient is φ = 5536478863440.

The previous prime is 12180253499633. The next prime is 12180253499663. The reversal of 12180253499656 is 65699435208121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12180253499594 and 12180253499603.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 69205985706 + ... + 69205985881.

It is an arithmetic number, because the mean of its divisors is an integer number (1557134680365).

Almost surely, 2^{12180253499656} is an apocalyptic number.

It is an amenable number.

12180253499656 is an abundant number, since it is smaller than the sum of its proper divisors (12733901386184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12180253499656 is a wasteful number, since it uses less digits than its factorization.

12180253499656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138411971604 (or 138411971600 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 12180253499656 in words is "twelve trillion, one hundred eighty billion, two hundred fifty-three million, four hundred ninety-nine thousand, six hundred fifty-six".