216697131553963 has 4 divisors (see below), whose sum is σ = 216697834309320. Its totient is φ = 216696428798608.

The previous prime is 216697131553961. The next prime is 216697131553979. The reversal of 216697131553963 is 369355131796612.

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 216697131553963 - 2¹ = 216697131553961 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 350914945 + ... + 351531922.

It is an arithmetic number, because the mean of its divisors is an integer number (54174458577330).

Almost surely, 2^{216697131553963} is an apocalyptic number.

216697131553963 is a deficient number, since it is larger than the sum of its proper divisors (702755357).

216697131553963 is an equidigital number, since it uses as much as digits as its factorization.

216697131553963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702755356.

The product of its digits is 165337200, while the sum is 67.

The spelling of 216697131553963 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-three".