8517878741 has 2 divisors, whose sum is σ = 8517878742. Its totient is φ = 8517878740.

The previous prime is 8517878731. The next prime is 8517878801. The reversal of 8517878741 is 1478787158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8515413841 + 2464900 = 92279^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 8517878741 - 2¹⁰ = 8517877717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8517878731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258939370 + 4258939371.

It is an arithmetic number, because the mean of its divisors is an integer number (4258939371).

Almost surely, 2^8517878741 is an apocalyptic number.

It is an amenable number.

8517878741 is a deficient number, since it is larger than the sum of its proper divisors (1).

8517878741 is an equidigital number, since it uses as much as digits as its factorization.

8517878741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3512320, while the sum is 56.

The square root of 8517878741 is about 92292.3547267053. The cubic root of 8517878741 is about 2042.2574283994.

The spelling of 8517878741 in words is "eight billion, five hundred seventeen million, eight hundred seventy-eight thousand, seven hundred forty-one".