8640000778 has 16 divisors (see below), whose sum is σ = 13016920320. Its totient is φ = 4301049456.

The previous prime is 8640000767. The next prime is 8640000779. The reversal of 8640000778 is 8770000468.

8640000778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8640000778² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8640000778.

It is not an unprimeable number, because it can be changed into a prime (8640000779) 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 7 ways as a sum of consecutive naturals, for example, 954751 + ... + 963757.

It is an arithmetic number, because the mean of its divisors is an integer number (813557520).

Almost surely, 2^8640000778 is an apocalyptic number.

8640000778 is a deficient number, since it is larger than the sum of its proper divisors (4376919542).

8640000778 is a wasteful number, since it uses less digits than its factorization.

8640000778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 8640000778 is about 92951.6044939516. The cubic root of 8640000778 is about 2051.9711976028.

The spelling of 8640000778 in words is "eight billion, six hundred forty million, seven hundred seventy-eight", and thus it is an aban number.