11446420509 has 12 divisors (see below), whose sum is σ = 16639030876. Its totient is φ = 7582341312.

The previous prime is 11446420487. The next prime is 11446420567. The reversal of 11446420509 is 90502464411.

11446420509 is a `hidden beast` number, since 1 + 1 + 4 + 4 + 642 + 0 + 5 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 959636484 + 10486784025 = 30978^2 + 102405^2 .

It is not a de Polignac number, because 11446420509 - 2¹⁵ = 11446387741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11446420009) 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 11 ways as a sum of consecutive naturals, for example, 4048984 + ... + 4051809.

Almost surely, 2^11446420509 is an apocalyptic number.

It is an amenable number.

11446420509 is a deficient number, since it is larger than the sum of its proper divisors (5192610367).

11446420509 is a wasteful number, since it uses less digits than its factorization.

11446420509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8100956 (or 8100953 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 11446420509 in words is "eleven billion, four hundred forty-six million, four hundred twenty thousand, five hundred nine".