628604406869 has 2 divisors, whose sum is σ = 628604406870. Its totient is φ = 628604406868.

The previous prime is 628604406733. The next prime is 628604406907. The reversal of 628604406869 is 968604406826.

628604406869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628198908100 + 405498769 = 792590^2 + 20137^2 .

It is a cyclic number.

It is not a de Polignac number, because 628604406869 - 2⁸ = 628604406613 is a prime.

It is a super-2 number, since 2×628604406869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628604406169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314302203434 + 314302203435.

It is an arithmetic number, because the mean of its divisors is an integer number (314302203435).

Almost surely, 2^628604406869 is an apocalyptic number.

It is an amenable number.

628604406869 is a deficient number, since it is larger than the sum of its proper divisors (1).

628604406869 is an equidigital number, since it uses as much as digits as its factorization.

628604406869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23887872, while the sum is 59.

The spelling of 628604406869 in words is "six hundred twenty-eight billion, six hundred four million, four hundred six thousand, eight hundred sixty-nine".