2183777573121 has 9 divisors (see below), whose sum is σ = 3154351787041. Its totient is φ = 1455848759892.

The previous prime is 2183777573119. The next prime is 2183777573179. The reversal of 2183777573121 is 1213757773812.

The square root of 2183777573121 is 1477761.

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

2183777573121 is a `hidden beast` number, since 2 + 18 + 37 + 7 + 7 + 573 + 1 + 21 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2183777573121 - 2¹ = 2183777573119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2183777573111) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4186990 + ... + 4679576.

Almost surely, 2^{2183777573121} is an apocalyptic number.

2183777573121 is the 1477761-st square number.

2183777573121 is the 738881-st centered octagonal number.

It is an amenable number.

2183777573121 is a deficient number, since it is larger than the sum of its proper divisors (970574213920).

2183777573121 is an frugal number, since it uses more digits than its factorization.

2183777573121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985180 (or 492590 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The spelling of 2183777573121 in words is "two trillion, one hundred eighty-three billion, seven hundred seventy-seven million, five hundred seventy-three thousand, one hundred twenty-one".