11266451809 has 4 divisors (see below), whose sum is σ = 11267785620. Its totient is φ = 11265118000.

The previous prime is 11266451797. The next prime is 11266451821. The reversal of 11266451809 is 90815466211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11266451797) and next prime (11266451821).

It can be written as a sum of positive squares in 2 ways, for example, as 6754374225 + 4512077584 = 82185^2 + 67172^2 .

It is a cyclic number.

It is not a de Polignac number, because 11266451809 - 2¹⁵ = 11266419041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11266451899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654154 + ... + 671155.

It is an arithmetic number, because the mean of its divisors is an integer number (2816946405).

Almost surely, 2^11266451809 is an apocalyptic number.

It is an amenable number.

11266451809 is a deficient number, since it is larger than the sum of its proper divisors (1333811).

11266451809 is an equidigital number, since it uses as much as digits as its factorization.

11266451809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333810.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 11266451809 in words is "eleven billion, two hundred sixty-six million, four hundred fifty-one thousand, eight hundred nine".