172270720541 has 2 divisors, whose sum is σ = 172270720542. Its totient is φ = 172270720540.

The previous prime is 172270720507. The next prime is 172270720543. The reversal of 172270720541 is 145027072271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125584475641 + 46686244900 = 354379^2 + 216070^2 .

It is a cyclic number.

It is not a de Polignac number, because 172270720541 - 2⁶ = 172270720477 is a prime.

Together with 172270720543, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172270720495 and 172270720504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172270720543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86135360270 + 86135360271.

It is an arithmetic number, because the mean of its divisors is an integer number (86135360271).

Almost surely, 2^172270720541 is an apocalyptic number.

It is an amenable number.

172270720541 is a deficient number, since it is larger than the sum of its proper divisors (1).

172270720541 is an equidigital number, since it uses as much as digits as its factorization.

172270720541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54880, while the sum is 38.

The spelling of 172270720541 in words is "one hundred seventy-two billion, two hundred seventy million, seven hundred twenty thousand, five hundred forty-one".