8416581533 has 2 divisors, whose sum is σ = 8416581534. Its totient is φ = 8416581532.

The previous prime is 8416581517. The next prime is 8416581539. The reversal of 8416581533 is 3351856148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6470271844 + 1946309689 = 80438^2 + 44117^2 .

It is a cyclic number.

It is not a de Polignac number, because 8416581533 - 2⁴ = 8416581517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8416581539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4208290766 + 4208290767.

It is an arithmetic number, because the mean of its divisors is an integer number (4208290767).

Almost surely, 2^8416581533 is an apocalyptic number.

It is an amenable number.

8416581533 is a deficient number, since it is larger than the sum of its proper divisors (1).

8416581533 is an equidigital number, since it uses as much as digits as its factorization.

8416581533 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 8416581533 is about 91741.9289801561. The cubic root of 8416581533 is about 2034.1294066756.

The spelling of 8416581533 in words is "eight billion, four hundred sixteen million, five hundred eighty-one thousand, five hundred thirty-three".