770628643 has 2 divisors, whose sum is σ = 770628644. Its totient is φ = 770628642.

The previous prime is 770628641. The next prime is 770628697. The reversal of 770628643 is 346826077.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 770628643 - 2¹ = 770628641 is a prime.

Together with 770628641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 770628643.

It is not a weakly prime, because it can be changed into another prime (770628641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385314321 + 385314322.

It is an arithmetic number, because the mean of its divisors is an integer number (385314322).

Almost surely, 2^770628643 is an apocalyptic number.

770628643 is a deficient number, since it is larger than the sum of its proper divisors (1).

770628643 is an equidigital number, since it uses as much as digits as its factorization.

770628643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 770628643 is about 27760.1989005843. The cubic root of 770628643 is about 916.8150115989.

The spelling of 770628643 in words is "seven hundred seventy million, six hundred twenty-eight thousand, six hundred forty-three".