628675663647 has 32 divisors (see below), whose sum is σ = 900140359680. Its totient is φ = 388879096320.

The previous prime is 628675663633. The next prime is 628675663667. The reversal of 628675663647 is 746366576826.

It is not a de Polignac number, because 628675663647 - 2¹¹ = 628675661599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628675663607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2545138 + ... + 2781200.

It is an arithmetic number, because the mean of its divisors is an integer number (28129386240).

Almost surely, 2^628675663647 is an apocalyptic number.

628675663647 is a deficient number, since it is larger than the sum of its proper divisors (271464696033).

628675663647 is a wasteful number, since it uses less digits than its factorization.

628675663647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236823.

The product of its digits is 365783040, while the sum is 66.

The spelling of 628675663647 in words is "six hundred twenty-eight billion, six hundred seventy-five million, six hundred sixty-three thousand, six hundred forty-seven".