11478238809 has 16 divisors (see below), whose sum is σ = 15725862912. Its totient is φ = 7443385488.

The previous prime is 11478238771. The next prime is 11478238819. The reversal of 11478238809 is 90883287411.

It is not a de Polignac number, because 11478238809 - 2¹¹ = 11478236761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11478238819) 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 15 ways as a sum of consecutive naturals, for example, 226729 + ... + 272694.

It is an arithmetic number, because the mean of its divisors is an integer number (982866432).

Almost surely, 2^11478238809 is an apocalyptic number.

It is an amenable number.

11478238809 is a deficient number, since it is larger than the sum of its proper divisors (4247624103).

11478238809 is a wasteful number, since it uses less digits than its factorization.

11478238809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499636.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 11478238809 in words is "eleven billion, four hundred seventy-eight million, two hundred thirty-eight thousand, eight hundred nine".