11860812266209 has 9 divisors (see below), whose sum is σ = 12284012455897. Its totient is φ = 11451722309104.

The previous prime is 11860812266189. The next prime is 11860812266273. The reversal of 11860812266209 is 90266221806811.

The square root of 11860812266209 is 3443953.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2661286509025 + 9199525757184 = 1631345^2 + 3033072^2 .

It is not a de Polignac number, because 11860812266209 - 2⁷ = 11860812266081 is a prime.

It is a super-2 number, since 2×11860812266209² (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 (11860812266279) 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, 99815259 + ... + 99934015.

Almost surely, 2^{11860812266209} is an apocalyptic number.

11860812266209 is the 3443953-rd square number.

11860812266209 is the 1721977-th centered octagonal number.

It is an amenable number.

11860812266209 is a deficient number, since it is larger than the sum of its proper divisors (423200189688).

11860812266209 is an frugal number, since it uses more digits than its factorization.

11860812266209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237572 (or 118786 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 11860812266209 in words is "eleven trillion, eight hundred sixty billion, eight hundred twelve million, two hundred sixty-six thousand, two hundred nine".