11778072440868 has 18 divisors (see below), whose sum is σ = 29772349781174. Its totient is φ = 3926024146944.

The previous prime is 11778072440851. The next prime is 11778072440881. The reversal of 11778072440868 is 86804427087711.

11778072440868 is a `hidden beast` number, since 1 + 1 + 77 + 80 + 7 + 24 + 408 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10009326717504 + 1768745723364 = 3163752^2 + 1329942^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163584339421 + ... + 163584339492.

Almost surely, 2^{11778072440868} is an apocalyptic number.

11778072440868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11778072440868 is an abundant number, since it is smaller than the sum of its proper divisors (17994277340306).

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

11778072440868 is a wasteful number, since it uses less digits than its factorization.

11778072440868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327168678923 (or 327168678918 counting only the distinct ones).

The product of its (nonzero) digits is 33718272, while the sum is 63.

The spelling of 11778072440868 in words is "eleven trillion, seven hundred seventy-eight billion, seventy-two million, four hundred forty thousand, eight hundred sixty-eight".