216697131594163 has 4 divisors (see below), whose sum is σ = 236396870830008. Its totient is φ = 196997392358320.

The previous prime is 216697131594149. The next prime is 216697131594191. The reversal of 216697131594163 is 361495131796612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216697131594163 - 2²⁹ = 216696594723251 is a prime.

It is a super-2 number, since 2×216697131594163² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216697131594095 and 216697131594104.

It is not an unprimeable number, because it can be changed into a prime (216697131594103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9849869617906 + ... + 9849869617927.

It is an arithmetic number, because the mean of its divisors is an integer number (59099217707502).

Almost surely, 2^{216697131594163} is an apocalyptic number.

216697131594163 is a deficient number, since it is larger than the sum of its proper divisors (19699739235845).

216697131594163 is a wasteful number, since it uses less digits than its factorization.

216697131594163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19699739235844.

The product of its digits is 44089920, while the sum is 64.

The spelling of 216697131594163 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-three".