161829056652025 has 27 divisors (see below), whose sum is σ = 233430799876911. Its totient is φ = 110968190681040.

The previous prime is 161829056651971. The next prime is 161829056652073. The reversal of 161829056652025 is 520256650928161.

The square root of 161829056652025 is 12721205.

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

It can be written as a sum of positive squares in only one way, i.e., 58258460394729 + 103570596257296 = 7632723^2 + 10176964^2 .

It is not a de Polignac number, because 161829056652025 - 2⁹ = 161829056651513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 445060444 + ... + 445423906.

Almost surely, 2^{161829056652025} is an apocalyptic number.

161829056652025 is the 12721205-th square number.

161829056652025 is the 6360603-rd centered octagonal number.

It is an amenable number.

161829056652025 is a deficient number, since it is larger than the sum of its proper divisors (71601743224886).

161829056652025 is an frugal number, since it uses more digits than its factorization.

161829056652025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726950 (or 363475 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 58.

The spelling of 161829056652025 in words is "one hundred sixty-one trillion, eight hundred twenty-nine billion, fifty-six million, six hundred fifty-two thousand, twenty-five".