11787789222225 has 81 divisors (see below), whose sum is σ = 21619726140987. Its totient is φ = 6139462180320.

The previous prime is 11787789222199. The next prime is 11787789222227. The reversal of 11787789222225 is 52222298778711.

The square root of 11787789222225 is 3433335.

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

11787789222225 is a `hidden beast` number, since 117 + 8 + 7 + 78 + 9 + 222 + 225 = 666.

11787789222225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4243604120001 + 7544185102224 = 2060001^2 + 2746668^2 .

It is not a de Polignac number, because 11787789222225 - 2¹⁷ = 11787789091153 is a prime.

It is a super-3 number, since 3×11787789222225³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11787789222227) 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, 2214498414 + ... + 2214503736.

Almost surely, 2^{11787789222225} is an apocalyptic number.

11787789222225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11787789222225 is the 3433335-th square number.

11787789222225 is the 1716668-th centered octagonal number.

It is an amenable number.

11787789222225 is a deficient number, since it is larger than the sum of its proper divisors (9831936918762).

11787789222225 is an frugal number, since it uses more digits than its factorization.

11787789222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10748 (or 5374 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 63.

The spelling of 11787789222225 in words is "eleven trillion, seven hundred eighty-seven billion, seven hundred eighty-nine million, two hundred twenty-two thousand, two hundred twenty-five".