6871581025 has 27 divisors (see below), whose sum is σ = 8698583353. Its totient is φ = 5384859200.

The previous prime is 6871581023. The next prime is 6871581047. The reversal of 6871581025 is 5201851786.

The square root of 6871581025 is 82895.

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 9778129 + 6861802896 = 3127^2 + 82836^2 .

It is not a de Polignac number, because 6871581025 - 2¹ = 6871581023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6871581023) 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, 24453885 + ... + 24454165.

Almost surely, 2^6871581025 is an apocalyptic number.

6871581025 is the 82895-th square number.

6871581025 is the 41448-th centered octagonal number.

It is an amenable number.

6871581025 is a deficient number, since it is larger than the sum of its proper divisors (1827002328).

6871581025 is an frugal number, since it uses more digits than its factorization.

6871581025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The cubic root of 6871581025 is about 1901.1609732815.

The spelling of 6871581025 in words is "six billion, eight hundred seventy-one million, five hundred eighty-one thousand, twenty-five".