216697131594164 has 24 divisors (see below), whose sum is σ = 408391212687360. Its totient is φ = 100013946935904.

The previous prime is 216697131594149. The next prime is 216697131594191. The reversal of 216697131594164 is 461495131796612.

It is a super-2 number, since 2×216697131594164² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216697131594164.

It is a congruent number.

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, 58801277 + ... + 62377755.

It is an arithmetic number, because the mean of its divisors is an integer number (17016300528640).

Almost surely, 2^{216697131594164} is an apocalyptic number.

It is an amenable number.

216697131594164 is a deficient number, since it is larger than the sum of its proper divisors (191694081093196).

216697131594164 is a wasteful number, since it uses less digits than its factorization.

216697131594164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741679 (or 4741677 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 65.

The spelling of 216697131594164 in words is "two hundred sixteen trillion, six hundred ninety-seven billion, one hundred thirty-one million, five hundred ninety-four thousand, one hundred sixty-four".