11878342505009 has 4 divisors (see below), whose sum is σ = 11924561736804. Its totient is φ = 11832123273216.

The previous prime is 11878342504997. The next prime is 11878342505011. The reversal of 11878342505009 is 90050524387811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8016712704400 + 3861629800609 = 2831380^2 + 1965103^2 .

It is a cyclic number.

It is not a de Polignac number, because 11878342505009 - 2⁴⁰ = 10778830877233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11878342505069) 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, 23109615512 + ... + 23109616025.

It is an arithmetic number, because the mean of its divisors is an integer number (2981140434201).

Almost surely, 2^{11878342505009} is an apocalyptic number.

It is an amenable number.

11878342505009 is a deficient number, since it is larger than the sum of its proper divisors (46219231795).

11878342505009 is an equidigital number, since it uses as much as digits as its factorization.

11878342505009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46219231794.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 11878342505009 in words is "eleven trillion, eight hundred seventy-eight billion, three hundred forty-two million, five hundred five thousand, nine".