8153806481 has 2 divisors, whose sum is σ = 8153806482. Its totient is φ = 8153806480.

The previous prime is 8153806477. The next prime is 8153806559. The reversal of 8153806481 is 1846083518.

It is a happy number.

8153806481 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., 8143438081 + 10368400 = 90241^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 8153806481 - 2² = 8153806477 is a prime.

It is a super-2 number, since 2×8153806481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8153806411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4076903240 + 4076903241.

It is an arithmetic number, because the mean of its divisors is an integer number (4076903241).

Almost surely, 2^8153806481 is an apocalyptic number.

It is an amenable number.

8153806481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8153806481 is an equidigital number, since it uses as much as digits as its factorization.

8153806481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 8153806481 is about 90298.4301137068. The cubic root of 8153806481 is about 2012.7359326087.

Adding to 8153806481 its reverse (1846083518), we get a palindrome (9999889999).

The spelling of 8153806481 in words is "eight billion, one hundred fifty-three million, eight hundred six thousand, four hundred eighty-one".