1125445566209 has 4 divisors (see below), whose sum is σ = 1125468608304. Its totient is φ = 1125422524116.

The previous prime is 1125445566197. The next prime is 1125445566221. The reversal of 1125445566209 is 9026655445211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1125445566197) and next prime (1125445566221).

It is a cyclic number.

It is not a de Polignac number, because 1125445566209 - 2¹² = 1125445562113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125445562209) 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, 11447627 + ... + 11545520.

It is an arithmetic number, because the mean of its divisors is an integer number (281367152076).

Almost surely, 2^{1125445566209} is an apocalyptic number.

It is an amenable number.

1125445566209 is a deficient number, since it is larger than the sum of its proper divisors (23042095).

1125445566209 is an equidigital number, since it uses as much as digits as its factorization.

1125445566209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23042094.

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 1125445566209 in words is "one trillion, one hundred twenty-five billion, four hundred forty-five million, five hundred sixty-six thousand, two hundred nine".