11878406885 has 32 divisors (see below), whose sum is σ = 14684768640. Its totient is φ = 9220958208.

The previous prime is 11878406849. The next prime is 11878406921. The reversal of 11878406885 is 58860487811.

It is an interprime number because it is at equal distance from previous prime (11878406849) and next prime (11878406921).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11878406885 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 11878406885.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6775169 + ... + 6776921.

It is an arithmetic number, because the mean of its divisors is an integer number (458899020).

Almost surely, 2^11878406885 is an apocalyptic number.

It is an amenable number.

11878406885 is a deficient number, since it is larger than the sum of its proper divisors (2806361755).

11878406885 is a wasteful number, since it uses less digits than its factorization.

11878406885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117.

The product of its (nonzero) digits is 3440640, while the sum is 56.

The spelling of 11878406885 in words is "eleven billion, eight hundred seventy-eight million, four hundred six thousand, eight hundred eighty-five".