11812027280769 has 9 divisors (see below), whose sum is σ = 17061832076419. Its totient is φ = 7874677980120.

The previous prime is 11812027280743. The next prime is 11812027280777. The reversal of 11812027280769 is 96708272021811.

The square root of 11812027280769 is 3436863.

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

11812027280769 is a `hidden beast` number, since 11 + 81 + 202 + 7 + 280 + 76 + 9 = 666.

11812027280769 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., 290211696369 + 11521815584400 = 538713^2 + 3394380^2 .

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

It is not a de Polignac number, because 11812027280769 - 2¹⁷ = 11812027149697 is a prime.

It is a super-2 number, since 2×11812027280769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11812027280789) 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, 9737779 + ... + 10883399.

Almost surely, 2^{11812027280769} is an apocalyptic number.

11812027280769 is the 3436863-rd square number.

11812027280769 is the 1718432-nd centered octagonal number.

It is an amenable number.

11812027280769 is a deficient number, since it is larger than the sum of its proper divisors (5249804795650).

11812027280769 is an frugal number, since it uses more digits than its factorization.

11812027280769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291248 (or 1145624 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The spelling of 11812027280769 in words is "eleven trillion, eight hundred twelve billion, twenty-seven million, two hundred eighty thousand, seven hundred sixty-nine".