628675663648 has 24 divisors (see below), whose sum is σ = 1244543374620. Its totient is φ = 312601155840.

The previous prime is 628675663633. The next prime is 628675663667. The reversal of 628675663648 is 846366576826.

It can be written as a sum of positive squares in 2 ways, for example, as 415390562064 + 213285101584 = 644508^2 + 461828^2 .

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, 54265243 + ... + 54276826.

Almost surely, 2^628675663648 is an apocalyptic number.

It is an amenable number.

628675663648 is a deficient number, since it is larger than the sum of its proper divisors (615867710972).

628675663648 is a wasteful number, since it uses less digits than its factorization.

628675663648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108542260 (or 108542252 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 67.

The spelling of 628675663648 in words is "six hundred twenty-eight billion, six hundred seventy-five million, six hundred sixty-three thousand, six hundred forty-eight".