8971655081 has 2 divisors, whose sum is σ = 8971655082. Its totient is φ = 8971655080.

The previous prime is 8971655023. The next prime is 8971655107. The reversal of 8971655081 is 1805561798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6196051225 + 2775603856 = 78715^2 + 52684^2 .

It is a cyclic number.

It is not a de Polignac number, because 8971655081 - 2¹⁰ = 8971654057 is a prime.

It is a super-2 number, since 2×8971655081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8971655281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4485827540 + 4485827541.

It is an arithmetic number, because the mean of its divisors is an integer number (4485827541).

Almost surely, 2^8971655081 is an apocalyptic number.

It is an amenable number.

8971655081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8971655081 is an equidigital number, since it uses as much as digits as its factorization.

8971655081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 50.

The square root of 8971655081 is about 94718.8211550376. The cubic root of 8971655081 is about 2077.8978299887.

The spelling of 8971655081 in words is "eight billion, nine hundred seventy-one million, six hundred fifty-five thousand, eighty-one".