8663853978 has 24 divisors (see below), whose sum is σ = 20215659828. Its totient is φ = 2665801152.

The previous prime is 8663853977. The next prime is 8663854009. The reversal of 8663853978 is 8793583668.

8663853978 is a `hidden beast` number, since 8 + 66 + 38 + 539 + 7 + 8 = 666.

8663853978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8077875129 + 585978849 = 89877^2 + 24207^2 .

It is not an unprimeable number, because it can be changed into a prime (8663853971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18512275 + ... + 18512742.

Almost surely, 2^8663853978 is an apocalyptic number.

8663853978 is an abundant number, since it is smaller than the sum of its proper divisors (11551805850).

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

8663853978 is a wasteful number, since it uses less digits than its factorization.

8663853978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37025038 (or 37025035 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 8663853978 is about 93079.8258378259. The cubic root of 8663853978 is about 2053.8578141421.

It can be divided in two parts, 8663 and 853978, that added together give a triangular number (862641 = T₁₃₁₃).

The spelling of 8663853978 in words is "eight billion, six hundred sixty-three million, eight hundred fifty-three thousand, nine hundred seventy-eight".