628673532257 has 4 divisors (see below), whose sum is σ = 628676503956. Its totient is φ = 628670560560.

The previous prime is 628673532203. The next prime is 628673532259. The reversal of 628673532257 is 752235376826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 344540824576 + 284132707681 = 586976^2 + 533041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628673532257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628673532259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141994 + ... + 1600467.

It is an arithmetic number, because the mean of its divisors is an integer number (157169125989).

Almost surely, 2^628673532257 is an apocalyptic number.

It is an amenable number.

628673532257 is a deficient number, since it is larger than the sum of its proper divisors (2971699).

628673532257 is a wasteful number, since it uses less digits than its factorization.

628673532257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971698.

The product of its digits is 25401600, while the sum is 56.

The spelling of 628673532257 in words is "six hundred twenty-eight billion, six hundred seventy-three million, five hundred thirty-two thousand, two hundred fifty-seven".