216787637697 has 8 divisors (see below), whose sum is σ = 289060896480. Its totient is φ = 144519735360.

The previous prime is 216787637687. The next prime is 216787637701. The reversal of 216787637697 is 796736787612.

216787637697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 216787637697 - 2⁴ = 216787637681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216787637687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243704 + ... + 1407257.

It is an arithmetic number, because the mean of its divisors is an integer number (36132612060).

Almost surely, 2^216787637697 is an apocalyptic number.

It is an amenable number.

216787637697 is a deficient number, since it is larger than the sum of its proper divisors (72273258783).

216787637697 is a wasteful number, since it uses less digits than its factorization.

216787637697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678223.

The product of its digits is 224042112, while the sum is 69.

The spelling of 216787637697 in words is "two hundred sixteen billion, seven hundred eighty-seven million, six hundred thirty-seven thousand, six hundred ninety-seven".