9085578778 has 4 divisors (see below), whose sum is σ = 13628368170. Its totient is φ = 4542789388.

The previous prime is 9085578767. The next prime is 9085578779. The reversal of 9085578778 is 8778755809.

9085578778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8941026249 + 144552529 = 94557^2 + 12023^2 .

It is not an unprimeable number, because it can be changed into a prime (9085578779) 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 as a sum of consecutive naturals, namely, 2271394693 + ... + 2271394696.

Almost surely, 2^9085578778 is an apocalyptic number.

9085578778 is a deficient number, since it is larger than the sum of its proper divisors (4542789392).

9085578778 is a wasteful number, since it uses less digits than its factorization.

9085578778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4542789391.

The product of its (nonzero) digits is 39513600, while the sum is 64.

The square root of 9085578778 is about 95318.3024292816. The cubic root of 9085578778 is about 2086.6560368498.

It can be divided in two parts, 908557 and 8778, that added together give a triangular number (917335 = T₁₃₅₄).

The spelling of 9085578778 in words is "nine billion, eighty-five million, five hundred seventy-eight thousand, seven hundred seventy-eight".