216636913797 has 8 divisors (see below), whose sum is σ = 288987896544. Its totient is φ = 144355270128.

The previous prime is 216636913783. The next prime is 216636913799. The reversal of 216636913797 is 797319636612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216636913797 - 2¹² = 216636909701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216636913797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216636913799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17327478 + ... + 17339975.

It is an arithmetic number, because the mean of its divisors is an integer number (36123487068).

Almost surely, 2^216636913797 is an apocalyptic number.

It is an amenable number.

216636913797 is a deficient number, since it is larger than the sum of its proper divisors (72350982747).

216636913797 is a wasteful number, since it uses less digits than its factorization.

216636913797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34669539.

The product of its digits is 15431472, while the sum is 60.

The spelling of 216636913797 in words is "two hundred sixteen billion, six hundred thirty-six million, nine hundred thirteen thousand, seven hundred ninety-seven".