7801497161 has 2 divisors, whose sum is σ = 7801497162. Its totient is φ = 7801497160.

The previous prime is 7801497131. The next prime is 7801497163. The reversal of 7801497161 is 1617941087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4547479225 + 3254017936 = 67435^2 + 57044^2 .

It is a cyclic number.

It is not a de Polignac number, because 7801497161 - 2¹⁰ = 7801496137 is a prime.

Together with 7801497163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7801497163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3900748580 + 3900748581.

It is an arithmetic number, because the mean of its divisors is an integer number (3900748581).

Almost surely, 2^7801497161 is an apocalyptic number.

It is an amenable number.

7801497161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7801497161 is an equidigital number, since it uses as much as digits as its factorization.

7801497161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 7801497161 is about 88326.0842616721. The cubic root of 7801497161 is about 1983.3193616761.

It can be divided in two parts, 780 and 1497161, that added together give a palindrome (1497941).

The spelling of 7801497161 in words is "seven billion, eight hundred one million, four hundred ninety-seven thousand, one hundred sixty-one".