628225856449 has 15 divisors (see below), whose sum is σ = 641329562337. Its totient is φ = 615389586084.

The previous prime is 628225856393. The next prime is 628225856483. The reversal of 628225856449 is 944658522826.

The square root of 628225856449 is 792607.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 628225856449 - 2³⁹ = 78470042561 is a prime.

It is a super-2 number, since 2×628225856449² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628225856549) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4946660224 + ... + 4946660350.

Almost surely, 2^628225856449 is an apocalyptic number.

628225856449 is the 792607-th square number.

628225856449 is the 396304-th centered octagonal number.

It is an amenable number.

628225856449 is a deficient number, since it is larger than the sum of its proper divisors (13103705888).

628225856449 is an frugal number, since it uses more digits than its factorization.

628225856449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 206 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 61.

The spelling of 628225856449 in words is "six hundred twenty-eight billion, two hundred twenty-five million, eight hundred fifty-six thousand, four hundred forty-nine".