8506188461 has 2 divisors, whose sum is σ = 8506188462. Its totient is φ = 8506188460.

The previous prime is 8506188421. The next prime is 8506188499. The reversal of 8506188461 is 1648816058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8414392900 + 91795561 = 91730^2 + 9581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8506188461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8506188421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4253094230 + 4253094231.

It is an arithmetic number, because the mean of its divisors is an integer number (4253094231).

Almost surely, 2^8506188461 is an apocalyptic number.

It is an amenable number.

8506188461 is a deficient number, since it is larger than the sum of its proper divisors (1).

8506188461 is an equidigital number, since it uses as much as digits as its factorization.

8506188461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 8506188461 is about 92229.0001084258. Note that the first 3 decimals coincide. The cubic root of 8506188461 is about 2041.3227085249.

The spelling of 8506188461 in words is "eight billion, five hundred six million, one hundred eighty-eight thousand, four hundred sixty-one".