858874830025 has 27 divisors (see below), whose sum is σ = 1131441040821. Its totient is φ = 646622912640.

The previous prime is 858874830019. The next prime is 858874830043. The reversal of 858874830025 is 520038478858.

The square root of 858874830025 is 926755.

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

It can be written as a sum of positive squares in 4 ways, for example, as 20089944121 + 838784885904 = 141739^2 + 915852^2 .

It is not a de Polignac number, because 858874830025 - 2⁵ = 858874829993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 78768724 + ... + 78779626.

Almost surely, 2^858874830025 is an apocalyptic number.

858874830025 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

858874830025 is the 926755-th square number.

858874830025 is the 463378-th centered octagonal number.

It is an amenable number.

858874830025 is a deficient number, since it is larger than the sum of its proper divisors (272566210796).

858874830025 is an frugal number, since it uses more digits than its factorization.

858874830025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21850 (or 10925 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 58.

The spelling of 858874830025 in words is "eight hundred fifty-eight billion, eight hundred seventy-four million, eight hundred thirty thousand, twenty-five".