272205205161 has 4 divisors (see below), whose sum is σ = 362940273552. Its totient is φ = 181470136772.

The previous prime is 272205205157. The next prime is 272205205253. The reversal of 272205205161 is 161502502272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 272205205161 - 2² = 272205205157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (272205405161) 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, 45367534191 + ... + 45367534196.

It is an arithmetic number, because the mean of its divisors is an integer number (90735068388).

Almost surely, 2^272205205161 is an apocalyptic number.

It is an amenable number.

272205205161 is a deficient number, since it is larger than the sum of its proper divisors (90735068391).

272205205161 is an equidigital number, since it uses as much as digits as its factorization.

272205205161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90735068390.

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 272205205161 in words is "two hundred seventy-two billion, two hundred five million, two hundred five thousand, one hundred sixty-one".