217272628607 has 4 divisors (see below), whose sum is σ = 218074372896. Its totient is φ = 216470884320.

The previous prime is 217272628597. The next prime is 217272628609. The reversal of 217272628607 is 706826272712.

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 217272628607 - 2⁶ = 217272628543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217272628609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400871738 + ... + 400872279.

It is an arithmetic number, because the mean of its divisors is an integer number (54518593224).

Almost surely, 2^217272628607 is an apocalyptic number.

217272628607 is a deficient number, since it is larger than the sum of its proper divisors (801744289).

217272628607 is an equidigital number, since it uses as much as digits as its factorization.

217272628607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801744288.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 217272628607 in words is "two hundred seventeen billion, two hundred seventy-two million, six hundred twenty-eight thousand, six hundred seven".