628164545 has 4 divisors (see below), whose sum is σ = 753797460. Its totient is φ = 502531632.

The previous prime is 628164527. The next prime is 628164547. The reversal of 628164545 is 545461826.

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 478909456 + 149255089 = 21884^2 + 12217^2 .

It is a cyclic number.

It is not a de Polignac number, because 628164545 - 2¹⁰ = 628163521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628164547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62816450 + ... + 62816459.

It is an arithmetic number, because the mean of its divisors is an integer number (188449365).

Almost surely, 2^628164545 is an apocalyptic number.

It is an amenable number.

628164545 is a deficient number, since it is larger than the sum of its proper divisors (125632915).

628164545 is a wasteful number, since it uses less digits than its factorization.

628164545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125632914.

The product of its digits is 230400, while the sum is 41.

The square root of 628164545 is about 25063.2109874214. The cubic root of 628164545 is about 856.4285569335.

The spelling of 628164545 in words is "six hundred twenty-eight million, one hundred sixty-four thousand, five hundred forty-five".