11976209163556 has 27 divisors (see below), whose sum is σ = 23037028126203. Its totient is φ = 5443696831320.

The previous prime is 11976209163509. The next prime is 11976209163559. The reversal of 11976209163556 is 65536190267911.

The square root of 11976209163556 is 3460666.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11976209163494 and 11976209163503.

It is not an unprimeable number, because it can be changed into a prime (11976209163559) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76056001 + ... + 76213303.

Almost surely, 2^{11976209163556} is an apocalyptic number.

11976209163556 is the 3460666-th square number.

It is an amenable number.

11976209163556 is a deficient number, since it is larger than the sum of its proper divisors (11060818962647).

11976209163556 is an frugal number, since it uses more digits than its factorization.

11976209163556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314632 (or 157316 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 61.

The spelling of 11976209163556 in words is "eleven trillion, nine hundred seventy-six billion, two hundred nine million, one hundred sixty-three thousand, five hundred fifty-six".