11561216031656 has 32 divisors (see below), whose sum is σ = 21713956200000. Its totient is φ = 5770829141376.

The previous prime is 11561216031637. The next prime is 11561216031679. The reversal of 11561216031656 is 65613061216511.

11561216031656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11561216031656² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70479125 + ... + 70642971.

It is an arithmetic number, because the mean of its divisors is an integer number (678561131250).

Almost surely, 2^{11561216031656} is an apocalyptic number.

It is an amenable number.

11561216031656 is a deficient number, since it is larger than the sum of its proper divisors (10152740168344).

11561216031656 is a wasteful number, since it uses less digits than its factorization.

11561216031656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178721 (or 178717 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 11561216031656 in words is "eleven trillion, five hundred sixty-one billion, two hundred sixteen million, thirty-one thousand, six hundred fifty-six".