11833854561369 has 9 divisors (see below), whose sum is σ = 17093360384373. Its totient is φ = 7889229494172.

The previous prime is 11833854561311. The next prime is 11833854561371. The reversal of 11833854561369 is 96316545833811.

The square root of 11833854561369 is 3440037.

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

11833854561369 is a `hidden beast` number, since 1 + 1 + 8 + 3 + 3 + 8 + 5 + 4 + 5 + 613 + 6 + 9 = 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 11833854561369 - 2¹⁹ = 11833854037081 is a prime.

It is a super-2 number, since 2×11833854561369² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11833854561769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9746772 + ... + 10893450.

Almost surely, 2^{11833854561369} is an apocalyptic number.

11833854561369 is the 3440037-th square number.

11833854561369 is the 1720019-th centered octagonal number.

It is an amenable number.

11833854561369 is a deficient number, since it is larger than the sum of its proper divisors (5259505823004).

11833854561369 is an frugal number, since it uses more digits than its factorization.

11833854561369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293364 (or 1146682 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 11833854561369 in words is "eleven trillion, eight hundred thirty-three billion, eight hundred fifty-four million, five hundred sixty-one thousand, three hundred sixty-nine".