11781878178 has 16 divisors (see below), whose sum is σ = 26930007360. Its totient is φ = 3366250896.

The previous prime is 11781878167. The next prime is 11781878183. The reversal of 11781878178 is 87187818711.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140260413 + ... + 140260496.

It is an arithmetic number, because the mean of its divisors is an integer number (1683125460).

Almost surely, 2^11781878178 is an apocalyptic number.

11781878178 is an abundant number, since it is smaller than the sum of its proper divisors (15148129182).

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

11781878178 is a wasteful number, since it uses less digits than its factorization.

11781878178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280520921.

The product of its digits is 1404928, while the sum is 57.

The spelling of 11781878178 in words is "eleven billion, seven hundred eighty-one million, eight hundred seventy-eight thousand, one hundred seventy-eight".