8816136421 has 2 divisors, whose sum is σ = 8816136422. Its totient is φ = 8816136420.

The previous prime is 8816136389. The next prime is 8816136451. The reversal of 8816136421 is 1246316188.

8816136421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7368333921 + 1447802500 = 85839^2 + 38050^2 .

It is a cyclic number.

It is not a de Polignac number, because 8816136421 - 2⁵ = 8816136389 is a prime.

It is a super-2 number, since 2×8816136421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8816136451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4408068210 + 4408068211.

It is an arithmetic number, because the mean of its divisors is an integer number (4408068211).

Almost surely, 2^8816136421 is an apocalyptic number.

It is an amenable number.

8816136421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8816136421 is an equidigital number, since it uses as much as digits as its factorization.

8816136421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 8816136421 is about 93894.2832178829. The cubic root of 8816136421 is about 2065.8213775399.

The spelling of 8816136421 in words is "eight billion, eight hundred sixteen million, one hundred thirty-six thousand, four hundred twenty-one".