7951992161 has 2 divisors, whose sum is σ = 7951992162. Its totient is φ = 7951992160.

The previous prime is 7951992151. The next prime is 7951992163. The reversal of 7951992161 is 1612991597.

7951992161 = 63055² + 63056².

7951992161 is digitally balanced in base 3, 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., 3976059136 + 3975933025 = 63056^2 + 63055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7951992161 is a prime.

It is a Sophie Germain prime.

Together with 7951992163, 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 (7951992163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3975996080 + 3975996081.

It is an arithmetic number, because the mean of its divisors is an integer number (3975996081).

Almost surely, 2^7951992161 is an apocalyptic number.

7951992161 is the 63056-th centered square number.

It is an amenable number.

7951992161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7951992161 is an equidigital number, since it uses as much as digits as its factorization.

7951992161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 50.

The square root of 7951992161 is about 89173.9432850202. The cubic root of 7951992161 is about 1995.9913173498.

The spelling of 7951992161 in words is "seven billion, nine hundred fifty-one million, nine hundred ninety-two thousand, one hundred sixty-one".