628647426668 has 12 divisors (see below), whose sum is σ = 1115627828112. Its totient is φ = 309896618640.

The previous prime is 628647426629. The next prime is 628647426689. The reversal of 628647426668 is 866624746826.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106773355 + ... + 1106773922.

It is an arithmetic number, because the mean of its divisors is an integer number (92968985676).

Almost surely, 2^628647426668 is an apocalyptic number.

It is an amenable number.

628647426668 is a deficient number, since it is larger than the sum of its proper divisors (486980401444).

628647426668 is a wasteful number, since it uses less digits than its factorization.

628647426668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213547352 (or 2213547350 counting only the distinct ones).

The product of its digits is 222953472, while the sum is 65.

The spelling of 628647426668 in words is "six hundred twenty-eight billion, six hundred forty-seven million, four hundred twenty-six thousand, six hundred sixty-eight".