628865254644 has 48 divisors (see below), whose sum is σ = 1602001872576. Its totient is φ = 190415948800.

The previous prime is 628865254631. The next prime is 628865254657. The reversal of 628865254644 is 446452568826.

It is an interprime number because it is at equal distance from previous prime (628865254631) and next prime (628865254657).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696797 + ... + 2033924.

It is an arithmetic number, because the mean of its divisors is an integer number (33375039012).

Almost surely, 2^628865254644 is an apocalyptic number.

It is an amenable number.

628865254644 is an abundant number, since it is smaller than the sum of its proper divisors (973136617932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628865254644 is a wasteful number, since it uses less digits than its factorization.

628865254644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732016 (or 3732014 counting only the distinct ones).

The product of its digits is 88473600, while the sum is 60.

The spelling of 628865254644 in words is "six hundred twenty-eight billion, eight hundred sixty-five million, two hundred fifty-four thousand, six hundred forty-four".