1111645609 has 4 divisors (see below), whose sum is σ = 1130487120. Its totient is φ = 1092804100.

The previous prime is 1111645583. The next prime is 1111645631. The reversal of 1111645609 is 9065461111.

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 a cyclic number.

It is not a de Polignac number, because 1111645609 - 2⁷ = 1111645481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111645699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9420667 + ... + 9420784.

It is an arithmetic number, because the mean of its divisors is an integer number (282621780).

Almost surely, 2^1111645609 is an apocalyptic number.

It is an amenable number.

1111645609 is a deficient number, since it is larger than the sum of its proper divisors (18841511).

1111645609 is an equidigital number, since it uses as much as digits as its factorization.

1111645609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841510.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1111645609 is about 33341.3498377015. The cubic root of 1111645609 is about 1035.9102229489.

The spelling of 1111645609 in words is "one billion, one hundred eleven million, six hundred forty-five thousand, six hundred nine".