216697131553965 has 16 divisors (see below), whose sum is σ = 350081579522688. Its totient is φ = 114449747150016.

The previous prime is 216697131553961. The next prime is 216697131553979. The reversal of 216697131553965 is 569355131796612.

It is not a de Polignac number, because 216697131553965 - 2² = 216697131553961 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216697131553965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216697131553961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70128519994 + ... + 70128523083.

It is an arithmetic number, because the mean of its divisors is an integer number (21880098720168).

Almost surely, 2^{216697131553965} is an apocalyptic number.

It is an amenable number.

216697131553965 is a deficient number, since it is larger than the sum of its proper divisors (133384447968723).

216697131553965 is a wasteful number, since it uses less digits than its factorization.

216697131553965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140257043188.

The product of its digits is 275562000, while the sum is 69.

The spelling of 216697131553965 in words is "two hundred sixteen trillion, six hundred ninety-seven billion, one hundred thirty-one million, five hundred fifty-three thousand, nine hundred sixty-five".