7857936025 has 9 divisors (see below), whose sum is σ = 9744390301. Its totient is φ = 6285994240.

The previous prime is 7857936011. The next prime is 7857936029. The reversal of 7857936025 is 5206397587.

The square root of 7857936025 is 88645.

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 8684809 + 7849251216 = 2947^2 + 88596^2 .

It is not a de Polignac number, because 7857936025 - 2⁹ = 7857935513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7857936029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 434361 + ... + 452089.

Almost surely, 2^7857936025 is an apocalyptic number.

7857936025 is the 88645-th square number.

7857936025 is the 44323-rd centered octagonal number.

It is an amenable number.

7857936025 is a deficient number, since it is larger than the sum of its proper divisors (1886454276).

7857936025 is an frugal number, since it uses more digits than its factorization.

7857936025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35468 (or 17734 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The cubic root of 7857936025 is about 1988.0905587861.

The spelling of 7857936025 in words is "seven billion, eight hundred fifty-seven million, nine hundred thirty-six thousand, twenty-five".