11145421609 has 16 divisors (see below), whose sum is σ = 13081818240. Its totient is φ = 9298281600.

The previous prime is 11145421601. The next prime is 11145421613. The reversal of 11145421609 is 90612454111.

It is a cyclic number.

It is not a de Polignac number, because 11145421609 - 2³ = 11145421601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11145421601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91884 + ... + 175309.

It is an arithmetic number, because the mean of its divisors is an integer number (817613640).

Almost surely, 2^11145421609 is an apocalyptic number.

It is an amenable number.

11145421609 is a deficient number, since it is larger than the sum of its proper divisors (1936396631).

11145421609 is a wasteful number, since it uses less digits than its factorization.

11145421609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267360.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 11145421609 in words is "eleven billion, one hundred forty-five million, four hundred twenty-one thousand, six hundred nine".