8517878805 has 16 divisors (see below), whose sum is σ = 13677813504. Its totient is φ = 4526466240.

The previous prime is 8517878801. The next prime is 8517878819. The reversal of 8517878805 is 5088787158.

It is not a de Polignac number, because 8517878805 - 2² = 8517878801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8517878801) 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 15 ways as a sum of consecutive naturals, for example, 1020861 + ... + 1029170.

It is an arithmetic number, because the mean of its divisors is an integer number (854863344).

Almost surely, 2^8517878805 is an apocalyptic number.

It is an amenable number.

8517878805 is a deficient number, since it is larger than the sum of its proper divisors (5159934699).

8517878805 is a wasteful number, since it uses less digits than its factorization.

8517878805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050316.

The product of its (nonzero) digits is 5017600, while the sum is 57.

The square root of 8517878805 is about 92292.3550734296. The cubic root of 8517878805 is about 2042.2574335143.

The spelling of 8517878805 in words is "eight billion, five hundred seventeen million, eight hundred seventy-eight thousand, eight hundred five".