628751563 has 16 divisors (see below), whose sum is σ = 696563712. Its totient is φ = 562780000.

The previous prime is 628751551. The next prime is 628751593. The reversal of 628751563 is 365157826.

It is a cyclic number.

It is not a de Polignac number, because 628751563 - 2⁵ = 628751531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628751503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210720 + ... + 213682.

It is an arithmetic number, because the mean of its divisors is an integer number (43535232).

Almost surely, 2^628751563 is an apocalyptic number.

628751563 is a deficient number, since it is larger than the sum of its proper divisors (67812149).

628751563 is a wasteful number, since it uses less digits than its factorization.

628751563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266.

The product of its digits is 302400, while the sum is 43.

The square root of 628751563 is about 25074.9190028602. The cubic root of 628751563 is about 856.6952505683.

The spelling of 628751563 in words is "six hundred twenty-eight million, seven hundred fifty-one thousand, five hundred sixty-three".