216697131594556 has 12 divisors (see below), whose sum is σ = 379220113067040. Its totient is φ = 108348527861120.

The previous prime is 216697131594521. The next prime is 216697131594683. The reversal of 216697131594556 is 655495131796612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6279501 + ... + 21744571.

It is an arithmetic number, because the mean of its divisors is an integer number (31601676088920).

Almost surely, 2^{216697131594556} is an apocalyptic number.

It is an amenable number.

216697131594556 is a deficient number, since it is larger than the sum of its proper divisors (162522981472484).

216697131594556 is a wasteful number, since it uses less digits than its factorization.

216697131594556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968084 (or 18968082 counting only the distinct ones).

The product of its digits is 367416000, while the sum is 70.

The spelling of 216697131594556 in words is "two hundred sixteen trillion, six hundred ninety-seven billion, one hundred thirty-one million, five hundred ninety-four thousand, five hundred fifty-six".