8506887881 has 2 divisors, whose sum is σ = 8506887882. Its totient is φ = 8506887880.

The previous prime is 8506887821. The next prime is 8506887901. The reversal of 8506887881 is 1887886058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5473632256 + 3033255625 = 73984^2 + 55075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8506887881 is a prime.

It is a super-2 number, since 2×8506887881² (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 8506887881.

It is not a weakly prime, because it can be changed into another prime (8506887821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4253443940 + 4253443941.

It is an arithmetic number, because the mean of its divisors is an integer number (4253443941).

Almost surely, 2^8506887881 is an apocalyptic number.

It is an amenable number.

8506887881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8506887881 is an equidigital number, since it uses as much as digits as its factorization.

8506887881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6881280, while the sum is 59.

The square root of 8506887881 is about 92232.7917879536. The cubic root of 8506887881 is about 2041.3786561371.

The spelling of 8506887881 in words is "eight billion, five hundred six million, eight hundred eighty-seven thousand, eight hundred eighty-one".