8481857409 has 33 divisors (see below), whose sum is σ = 12756372033. Its totient is φ = 5639651892.

The previous prime is 8481857387. The next prime is 8481857437. The reversal of 8481857409 is 9047581848.

The square root of 8481857409 is 92097.

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

8481857409 is a `hidden beast` number, since 84 + 81 + 85 + 7 + 409 = 666.

It is not a de Polignac number, because 8481857409 - 2⁷ = 8481857281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8481859409) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 22379382 + ... + 22379760.

Almost surely, 2^8481857409 is an apocalyptic number.

8481857409 is the 92097-th square number.

8481857409 is the 46049-th centered octagonal number.

It is an amenable number.

8481857409 is a deficient number, since it is larger than the sum of its proper divisors (4274514624).

8481857409 is an frugal number, since it uses more digits than its factorization.

8481857409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The cubic root of 8481857409 is about 2039.3745206131.

The spelling of 8481857409 in words is "eight billion, four hundred eighty-one million, eight hundred fifty-seven thousand, four hundred nine".