12180653956 has 27 divisors (see below), whose sum is σ = 21524819589. Its totient is φ = 6031281168.

The previous prime is 12180653939. The next prime is 12180653957. The reversal of 12180653956 is 65935608121.

The square root of 12180653956 is 110366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8163122500 + 4017531456 = 90350^2 + 63384^2 .

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30681550 + ... + 30681946.

Almost surely, 2^12180653956 is an apocalyptic number.

12180653956 is the 110366-th square number.

It is an amenable number.

12180653956 is a deficient number, since it is larger than the sum of its proper divisors (9344165633).

12180653956 is an frugal number, since it uses more digits than its factorization.

12180653956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 12180653956 in words is "twelve billion, one hundred eighty million, six hundred fifty-three thousand, nine hundred fifty-six".