8116113521 has 2 divisors, whose sum is σ = 8116113522. Its totient is φ = 8116113520.

The previous prime is 8116113493. The next prime is 8116113527. The reversal of 8116113521 is 1253116118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8010250000 + 105863521 = 89500^2 + 10289^2 .

It is a cyclic number.

It is not a de Polignac number, because 8116113521 - 2²⁶ = 8049004657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8116113527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4058056760 + 4058056761.

It is an arithmetic number, because the mean of its divisors is an integer number (4058056761).

Almost surely, 2^8116113521 is an apocalyptic number.

It is an amenable number.

8116113521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8116113521 is an equidigital number, since it uses as much as digits as its factorization.

8116113521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 29.

The square root of 8116113521 is about 90089.4750844959. The cubic root of 8116113521 is about 2009.6296869010.

Adding to 8116113521 its reverse (1253116118), we get a palindrome (9369229639).

The spelling of 8116113521 in words is "eight billion, one hundred sixteen million, one hundred thirteen thousand, five hundred twenty-one".