628344965779 has 2 divisors, whose sum is σ = 628344965780. Its totient is φ = 628344965778.

The previous prime is 628344965767. The next prime is 628344965813. The reversal of 628344965779 is 977569443826.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 628344965779 - 2²¹ = 628342868627 is a prime.

It is not a weakly prime, because it can be changed into another prime (628344965879) 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, 314172482889 + 314172482890.

It is an arithmetic number, because the mean of its divisors is an integer number (314172482890).

Almost surely, 2^628344965779 is an apocalyptic number.

628344965779 is a deficient number, since it is larger than the sum of its proper divisors (1).

628344965779 is an equidigital number, since it uses as much as digits as its factorization.

628344965779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 548674560, while the sum is 70.

The spelling of 628344965779 in words is "six hundred twenty-eight billion, three hundred forty-four million, nine hundred sixty-five thousand, seven hundred seventy-nine".