628688764036 has 12 divisors (see below), whose sum is σ = 1101136933260. Its totient is φ = 314078211680.

The previous prime is 628688764027. The next prime is 628688764091. The reversal of 628688764036 is 630467886826.

It can be written as a sum of positive squares in 2 ways, for example, as 513435303936 + 115253460100 = 716544^2 + 339490^2 .

It is a super-2 number, since 2×628688764036² (a number of 24 digits) contains 22 as substring.

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, 66537271 + ... + 66546718.

It is an arithmetic number, because the mean of its divisors is an integer number (91761411105).

Almost surely, 2^628688764036 is an apocalyptic number.

It is an amenable number.

628688764036 is a deficient number, since it is larger than the sum of its proper divisors (472448169224).

628688764036 is a wasteful number, since it uses less digits than its factorization.

628688764036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133085174 (or 133085172 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 64.

The spelling of 628688764036 in words is "six hundred twenty-eight billion, six hundred eighty-eight million, seven hundred sixty-four thousand, thirty-six".