857503780225 has 27 divisors (see below), whose sum is σ = 1070675349097. Its totient is φ = 681280347680.

The previous prime is 857503780223. The next prime is 857503780241. The reversal of 857503780225 is 522087305758.

The square root of 857503780225 is 926015.

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

857503780225 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 4 ways, for example, as 441107177281 + 416396602944 = 664159^2 + 645288^2 .

It is not a de Polignac number, because 857503780225 - 2¹ = 857503780223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857503780223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 773221971 + ... + 773223079.

Almost surely, 2^857503780225 is an apocalyptic number.

857503780225 is the 926015-th square number.

857503780225 is the 463008-th centered octagonal number.

It is an amenable number.

857503780225 is a deficient number, since it is larger than the sum of its proper divisors (213171568872).

857503780225 is an frugal number, since it uses more digits than its factorization.

857503780225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 857503780225 in words is "eight hundred fifty-seven billion, five hundred three million, seven hundred eighty thousand, two hundred twenty-five".