8506888561 has 2 divisors, whose sum is σ = 8506888562. Its totient is φ = 8506888560.

The previous prime is 8506888547. The next prime is 8506888571. The reversal of 8506888561 is 1658886058.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8234473536 + 272415025 = 90744^2 + 16505^2 .

It is a cyclic number.

It is not a de Polignac number, because 8506888561 - 2¹⁷ = 8506757489 is a prime.

It is not a weakly prime, because it can be changed into another prime (8506888571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4253444280 + 4253444281.

It is an arithmetic number, because the mean of its divisors is an integer number (4253444281).

Almost surely, 2^8506888561 is an apocalyptic number.

It is an amenable number.

8506888561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8506888561 is an equidigital number, since it uses as much as digits as its factorization.

8506888561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3686400, while the sum is 55.

The square root of 8506888561 is about 92232.7954742780. The cubic root of 8506888561 is about 2041.3787105297.

The spelling of 8506888561 in words is "eight billion, five hundred six million, eight hundred eighty-eight thousand, five hundred sixty-one".