772211161 has 2 divisors, whose sum is σ = 772211162. Its totient is φ = 772211160.

The previous prime is 772211149. The next prime is 772211183. The reversal of 772211161 is 161112277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 742235536 + 29975625 = 27244^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 772211161 - 2²⁵ = 738656729 is a prime.

It is not a weakly prime, because it can be changed into another prime (772211861) 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, 386105580 + 386105581.

It is an arithmetic number, because the mean of its divisors is an integer number (386105581).

Almost surely, 2^772211161 is an apocalyptic number.

It is an amenable number.

772211161 is a deficient number, since it is larger than the sum of its proper divisors (1).

772211161 is an equidigital number, since it uses as much as digits as its factorization.

772211161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 28.

The square root of 772211161 is about 27788.6876444355. The cubic root of 772211161 is about 917.4421551041.

The spelling of 772211161 in words is "seven hundred seventy-two million, two hundred eleven thousand, one hundred sixty-one".