8161220108453 has 2 divisors, whose sum is σ = 8161220108454. Its totient is φ = 8161220108452.

The previous prime is 8161220108449. The next prime is 8161220108497. The reversal of 8161220108453 is 3548010221618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6015531264964 + 2145688843489 = 2452658^2 + 1464817^2 .

It is a cyclic number.

It is not a de Polignac number, because 8161220108453 - 2² = 8161220108449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8161220108453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161220108443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080610054226 + 4080610054227.

It is an arithmetic number, because the mean of its divisors is an integer number (4080610054227).

Almost surely, 2^{8161220108453} is an apocalyptic number.

It is an amenable number.

8161220108453 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161220108453 is an equidigital number, since it uses as much as digits as its factorization.

8161220108453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 8161220108453 in words is "eight trillion, one hundred sixty-one billion, two hundred twenty million, one hundred eight thousand, four hundred fifty-three".