768201649 has 2 divisors, whose sum is σ = 768201650. Its totient is φ = 768201648.

The previous prime is 768201569. The next prime is 768201683. The reversal of 768201649 is 946102867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690638400 + 77563249 = 26280^2 + 8807^2 .

It is a cyclic number.

It is not a de Polignac number, because 768201649 - 2¹³ = 768193457 is a prime.

It is not a weakly prime, because it can be changed into another prime (768201689) 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, 384100824 + 384100825.

It is an arithmetic number, because the mean of its divisors is an integer number (384100825).

Almost surely, 2^768201649 is an apocalyptic number.

It is an amenable number.

768201649 is a deficient number, since it is larger than the sum of its proper divisors (1).

768201649 is an equidigital number, since it uses as much as digits as its factorization.

768201649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 768201649 is about 27716.4508730826. The cubic root of 768201649 is about 915.8515365019.

The spelling of 768201649 in words is "seven hundred sixty-eight million, two hundred one thousand, six hundred forty-nine".