628994056697 has 8 divisors (see below), whose sum is σ = 630670441800. Its totient is φ = 627318134784.

The previous prime is 628994056687. The next prime is 628994056711. The reversal of 628994056697 is 796650499826.

It can be written as a sum of positive squares in 4 ways, for example, as 294567793081 + 334426263616 = 542741^2 + 578296^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628994056697 - 2⁶ = 628994056633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628994056697.

It is not an unprimeable number, because it can be changed into a prime (628994056687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2694329 + ... + 2918457.

It is an arithmetic number, because the mean of its divisors is an integer number (78833805225).

Almost surely, 2^628994056697 is an apocalyptic number.

It is an amenable number.

628994056697 is a deficient number, since it is larger than the sum of its proper divisors (1676385103).

628994056697 is a wasteful number, since it uses less digits than its factorization.

628994056697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231595.

The product of its (nonzero) digits is 352719360, while the sum is 71.

The spelling of 628994056697 in words is "six hundred twenty-eight billion, nine hundred ninety-four million, fifty-six thousand, six hundred ninety-seven".