8133625081 has 2 divisors, whose sum is σ = 8133625082. Its totient is φ = 8133625080.

The previous prime is 8133625069. The next prime is 8133625109. The reversal of 8133625081 is 1805263318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7446136681 + 687488400 = 86291^2 + 26220^2 .

It is a cyclic number.

It is not a de Polignac number, because 8133625081 - 2⁷ = 8133624953 is a prime.

It is a super-2 number, since 2×8133625081² (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 8133625081.

It is not a weakly prime, because it can be changed into another prime (8133625021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4066812540 + 4066812541.

It is an arithmetic number, because the mean of its divisors is an integer number (4066812541).

Almost surely, 2^8133625081 is an apocalyptic number.

It is an amenable number.

8133625081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8133625081 is an equidigital number, since it uses as much as digits as its factorization.

8133625081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 8133625081 is about 90186.6125375601. The cubic root of 8133625081 is about 2011.0739935797.

Adding to 8133625081 its reverse (1805263318), we get a palindrome (9938888399).

The spelling of 8133625081 in words is "eight billion, one hundred thirty-three million, six hundred twenty-five thousand, eighty-one".