8534831561 has 2 divisors, whose sum is σ = 8534831562. Its totient is φ = 8534831560.

The previous prime is 8534831533. The next prime is 8534831609. The reversal of 8534831561 is 1651384358.

8534831561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8002375936 + 532455625 = 89456^2 + 23075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8534831561 is a prime.

It is not a weakly prime, because it can be changed into another prime (8534831761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4267415780 + 4267415781.

It is an arithmetic number, because the mean of its divisors is an integer number (4267415781).

Almost surely, 2^8534831561 is an apocalyptic number.

It is an amenable number.

8534831561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8534831561 is an equidigital number, since it uses as much as digits as its factorization.

8534831561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 8534831561 is about 92384.1521095474. The cubic root of 8534831561 is about 2043.6114070919.

The spelling of 8534831561 in words is "eight billion, five hundred thirty-four million, eight hundred thirty-one thousand, five hundred sixty-one".