772836161 has 2 divisors, whose sum is σ = 772836162. Its totient is φ = 772836160.

The previous prime is 772836139. The next prime is 772836227. The reversal of 772836161 is 161638277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694849600 + 77986561 = 26360^2 + 8831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772836161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (772836121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386418080 + 386418081.

It is an arithmetic number, because the mean of its divisors is an integer number (386418081).

Almost surely, 2^772836161 is an apocalyptic number.

It is an amenable number.

772836161 is a deficient number, since it is larger than the sum of its proper divisors (1).

772836161 is an equidigital number, since it uses as much as digits as its factorization.

772836161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 772836161 is about 27799.9309531517. The cubic root of 772836161 is about 917.6896032757.

The spelling of 772836161 in words is "seven hundred seventy-two million, eight hundred thirty-six thousand, one hundred sixty-one".