11809242078 has 8 divisors (see below), whose sum is σ = 23618484168. Its totient is φ = 3936414024.

The previous prime is 11809242077. The next prime is 11809242101. The reversal of 11809242078 is 87024290811.

It is a sphenic number, since it is the product of 3 distinct primes.

11809242078 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809242077) 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, 984103501 + ... + 984103512.

It is an arithmetic number, because the mean of its divisors is an integer number (2952310521).

Almost surely, 2^11809242078 is an apocalyptic number.

11809242078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11809242078 is a wasteful number, since it uses less digits than its factorization.

11809242078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968207018.

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 11809242078 in words is "eleven billion, eight hundred nine million, two hundred forty-two thousand, seventy-eight".