2049567320161 has 27 divisors (see below), whose sum is σ = 2181909448593. Its totient is φ = 1924971042600.

The previous prime is 2049567320159. The next prime is 2049567320179. The reversal of 2049567320161 is 1610237659402.

It is a happy number.

The square root of 2049567320161 is 1431631.

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

It is not a de Polignac number, because 2049567320161 - 2¹ = 2049567320159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2049567320131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4107349090 + ... + 4107349588.

It is an arithmetic number, because the mean of its divisors is an integer number (80811461059).

Almost surely, 2^{2049567320161} is an apocalyptic number.

2049567320161 is the 1431631-st square number.

2049567320161 is the 715816-th centered octagonal number.

It is an amenable number.

2049567320161 is a deficient number, since it is larger than the sum of its proper divisors (132342128432).

2049567320161 is an frugal number, since it uses more digits than its factorization.

2049567320161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 2049567320161 in words is "two trillion, forty-nine billion, five hundred sixty-seven million, three hundred twenty thousand, one hundred sixty-one".