628581242289 has 32 divisors (see below), whose sum is σ = 1125292299264. Its totient is φ = 301417577280.

The previous prime is 628581242273. The next prime is 628581242291. The reversal of 628581242289 is 982242185826.

It is a happy number.

It is not a de Polignac number, because 628581242289 - 2⁴ = 628581242273 is a prime.

It is a super-2 number, since 2×628581242289² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628581242209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104655879 + ... + 104661884.

It is an arithmetic number, because the mean of its divisors is an integer number (35165384352).

Almost surely, 2^628581242289 is an apocalyptic number.

It is an amenable number.

628581242289 is a deficient number, since it is larger than the sum of its proper divisors (496711056975).

628581242289 is a wasteful number, since it uses less digits than its factorization.

628581242289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209317797.

The product of its digits is 8847360, while the sum is 57.

The spelling of 628581242289 in words is "six hundred twenty-eight billion, five hundred eighty-one million, two hundred forty-two thousand, two hundred eighty-nine".