628864056829 has 2 divisors, whose sum is σ = 628864056830. Its totient is φ = 628864056828.

The previous prime is 628864056823. The next prime is 628864056851. The reversal of 628864056829 is 928650468826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614271900025 + 14592156804 = 783755^2 + 120798^2 .

It is a cyclic number.

It is not a de Polignac number, because 628864056829 - 2⁷ = 628864056701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628864056823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314432028414 + 314432028415.

It is an arithmetic number, because the mean of its divisors is an integer number (314432028415).

Almost surely, 2^628864056829 is an apocalyptic number.

It is an amenable number.

628864056829 is a deficient number, since it is larger than the sum of its proper divisors (1).

628864056829 is an equidigital number, since it uses as much as digits as its factorization.

628864056829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79626240, while the sum is 64.

The spelling of 628864056829 in words is "six hundred twenty-eight billion, eight hundred sixty-four million, fifty-six thousand, eight hundred twenty-nine".