7724165161 has 2 divisors, whose sum is σ = 7724165162. Its totient is φ = 7724165160.

The previous prime is 7724165153. The next prime is 7724165243. The reversal of 7724165161 is 1615614277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7642081561 + 82083600 = 87419^2 + 9060^2 .

It is a cyclic number.

It is not a de Polignac number, because 7724165161 - 2³ = 7724165153 is a prime.

It is not a weakly prime, because it can be changed into another prime (7724165131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3862082580 + 3862082581.

It is an arithmetic number, because the mean of its divisors is an integer number (3862082581).

Almost surely, 2^7724165161 is an apocalyptic number.

It is an amenable number.

7724165161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7724165161 is an equidigital number, since it uses as much as digits as its factorization.

7724165161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 7724165161 is about 87887.2297947774. The cubic root of 7724165161 is about 1976.7444000489.

The spelling of 7724165161 in words is "seven billion, seven hundred twenty-four million, one hundred sixty-five thousand, one hundred sixty-one".