2113351265169 has 81 divisors (see below), whose sum is σ = 3203402818161. Its totient is φ = 1342555194240.

The previous prime is 2113351265141. The next prime is 2113351265177. The reversal of 2113351265169 is 9615621533112.

The square root of 2113351265169 is 1453737.

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

2113351265169 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 3 + 5 + 126 + 516 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 228804372225 + 1884546892944 = 478335^2 + 1372788^2 .

It is not a de Polignac number, because 2113351265169 - 2¹³ = 2113351256977 is a prime.

It is a super-2 number, since 2×2113351265169² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2113351265369) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 9476911392 + ... + 9476911614.

Almost surely, 2^{2113351265169} is an apocalyptic number.

2113351265169 is the 1453737-th square number.

2113351265169 is the 726869-th centered octagonal number.

It is an amenable number.

2113351265169 is a deficient number, since it is larger than the sum of its proper divisors (1090051552992).

2113351265169 is an frugal number, since it uses more digits than its factorization.

2113351265169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 320 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 2113351265169 in words is "two trillion, one hundred thirteen billion, three hundred fifty-one million, two hundred sixty-five thousand, one hundred sixty-nine".