8151663449 has 2 divisors, whose sum is σ = 8151663450. Its totient is φ = 8151663448.

The previous prime is 8151663391. The next prime is 8151663451. The reversal of 8151663449 is 9443661518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6428832400 + 1722831049 = 80180^2 + 41507^2 .

It is a cyclic number.

It is not a de Polignac number, because 8151663449 - 2¹⁶ = 8151597913 is a prime.

It is a Sophie Germain prime.

Together with 8151663451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8151663349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075831724 + 4075831725.

It is an arithmetic number, because the mean of its divisors is an integer number (4075831725).

Almost surely, 2^8151663449 is an apocalyptic number.

It is an amenable number.

8151663449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151663449 is an equidigital number, since it uses as much as digits as its factorization.

8151663449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 8151663449 is about 90286.5629482040. The cubic root of 8151663449 is about 2012.5595840749.

The spelling of 8151663449 in words is "eight billion, one hundred fifty-one million, six hundred sixty-three thousand, four hundred forty-nine".