771216001 has 2 divisors, whose sum is σ = 771216002. Its totient is φ = 771216000.

The previous prime is 771215989. The next prime is 771216031. The reversal of 771216001 is 100612177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753777025 + 17438976 = 27455^2 + 4176^2 .

It is a cyclic number.

It is not a de Polignac number, because 771216001 - 2⁵ = 771215969 is a prime.

It is not a weakly prime, because it can be changed into another prime (771216031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385608000 + 385608001.

It is an arithmetic number, because the mean of its divisors is an integer number (385608001).

Almost surely, 2^771216001 is an apocalyptic number.

It is an amenable number.

771216001 is a deficient number, since it is larger than the sum of its proper divisors (1).

771216001 is an equidigital number, since it uses as much as digits as its factorization.

771216001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 771216001 is about 27770.7760244470. The cubic root of 771216001 is about 917.0478785720.

Adding to 771216001 its reverse (100612177), we get a palindrome (871828178).

The spelling of 771216001 in words is "seven hundred seventy-one million, two hundred sixteen thousand, one".