8582778685 has 8 divisors (see below), whose sum is σ = 11091591000. Its totient is φ = 6338051904.

The previous prime is 8582778679. The next prime is 8582778689. The reversal of 8582778685 is 5868772858.

It can be written as a sum of positive squares in 4 ways, for example, as 199911321 + 8382867364 = 14139^2 + 91558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8582778685 - 2⁵ = 8582778653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8582778689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66021310 + ... + 66021439.

It is an arithmetic number, because the mean of its divisors is an integer number (1386448875).

Almost surely, 2^8582778685 is an apocalyptic number.

It is an amenable number.

8582778685 is a deficient number, since it is larger than the sum of its proper divisors (2508812315).

8582778685 is a wasteful number, since it uses less digits than its factorization.

8582778685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132042767.

The product of its digits is 60211200, while the sum is 64.

The square root of 8582778685 is about 92643.2873175386. The cubic root of 8582778685 is about 2047.4311416138.

The spelling of 8582778685 in words is "eight billion, five hundred eighty-two million, seven hundred seventy-eight thousand, six hundred eighty-five".