173228266849 has 27 divisors (see below), whose sum is σ = 192426881913. Its totient is φ = 155827900800.

The previous prime is 173228266843. The next prime is 173228266859. The reversal of 173228266849 is 948662822371.

It is a happy number.

The square root of 173228266849 is 416207.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 448380625 + 172779886224 = 21175^2 + 415668^2 .

It is not a de Polignac number, because 173228266849 - 2³¹ = 171080783201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 173228266793 and 173228266802.

It is not an unprimeable number, because it can be changed into a prime (173228266843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 718789369 + ... + 718789609.

Almost surely, 2^173228266849 is an apocalyptic number.

173228266849 is the 416207-th square number.

173228266849 is the 208104-th centered octagonal number.

It is an amenable number.

173228266849 is a deficient number, since it is larger than the sum of its proper divisors (19198615064).

173228266849 is an frugal number, since it uses more digits than its factorization.

173228266849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 409 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 58.

The spelling of 173228266849 in words is "one hundred seventy-three billion, two hundred twenty-eight million, two hundred sixty-six thousand, eight hundred forty-nine".