8763785778 has 64 divisors (see below), whose sum is σ = 19479191040. Its totient is φ = 2606102400.

The previous prime is 8763785717. The next prime is 8763785783. The reversal of 8763785778 is 8775873678.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 2689126 + ... + 2692382.

It is an arithmetic number, because the mean of its divisors is an integer number (304362360).

Almost surely, 2^8763785778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8763785778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9739595520).

8763785778 is an abundant number, since it is smaller than the sum of its proper divisors (10715405262).

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

8763785778 is a wasteful number, since it uses less digits than its factorization.

8763785778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023.

The product of its digits is 110638080, while the sum is 66.

The square root of 8763785778 is about 93615.0937509545. The cubic root of 8763785778 is about 2061.7242749055.

The spelling of 8763785778 in words is "eight billion, seven hundred sixty-three million, seven hundred eighty-five thousand, seven hundred seventy-eight".