272205661165 has 4 divisors (see below), whose sum is σ = 326646793404. Its totient is φ = 217764528928.

The previous prime is 272205661099. The next prime is 272205661177. The reversal of 272205661165 is 561166502272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30191842564 + 242013818601 = 173758^2 + 491949^2 .

It is a cyclic number.

It is not a de Polignac number, because 272205661165 - 2¹⁵ = 272205628397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27220566112 + ... + 27220566121.

It is an arithmetic number, because the mean of its divisors is an integer number (81661698351).

Almost surely, 2^272205661165 is an apocalyptic number.

It is an amenable number.

272205661165 is a deficient number, since it is larger than the sum of its proper divisors (54441132239).

272205661165 is an equidigital number, since it uses as much as digits as its factorization.

272205661165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54441132238.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 272205661165 in words is "two hundred seventy-two billion, two hundred five million, six hundred sixty-one thousand, one hundred sixty-five".