764642161 has 2 divisors, whose sum is σ = 764642162. Its totient is φ = 764642160.

The previous prime is 764642147. The next prime is 764642237. The reversal of 764642161 is 161246467.

764642161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755975025 + 8667136 = 27495^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 764642161 - 2¹⁷ = 764511089 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 764642161.

It is not a weakly prime, because it can be changed into another prime (764642141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382321080 + 382321081.

It is an arithmetic number, because the mean of its divisors is an integer number (382321081).

Almost surely, 2^764642161 is an apocalyptic number.

It is an amenable number.

764642161 is a deficient number, since it is larger than the sum of its proper divisors (1).

764642161 is an equidigital number, since it uses as much as digits as its factorization.

764642161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 764642161 is about 27652.1637670545. The cubic root of 764642161 is about 914.4348031880.

The spelling of 764642161 in words is "seven hundred sixty-four million, six hundred forty-two thousand, one hundred sixty-one".