618765625 has 21 divisors (see below), whose sum is σ = 777353331. Its totient is φ = 492525000.

The previous prime is 618765617. The next prime is 618765691. The reversal of 618765625 is 526567816.

The square root of 618765625 is 24875.

It is a perfect power (a square), and thus also a powerful number.

618765625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 542098089 + 76667536 = 23283^2 + 8756^2 .

It is not a de Polignac number, because 618765625 - 2³ = 618765617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 3109276 + ... + 3109474.

Almost surely, 2^618765625 is an apocalyptic number.

618765625 is the 24875-th square number.

618765625 is the 12438-th centered octagonal number.

It is an amenable number.

618765625 is a deficient number, since it is larger than the sum of its proper divisors (158587706).

618765625 is an frugal number, since it uses more digits than its factorization.

618765625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 204 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The cubic root of 618765625 is about 852.1356331675.

The spelling of 618765625 in words is "six hundred eighteen million, seven hundred sixty-five thousand, six hundred twenty-five".