6531270681 has 32 divisors (see below), whose sum is σ = 10250247168. Its totient is φ = 3660779520.

The previous prime is 6531270661. The next prime is 6531270703. The reversal of 6531270681 is 1860721356.

It is not a de Polignac number, because 6531270681 - 2⁹ = 6531270169 is a prime.

It is a super-2 number, since 2×6531270681² = 85314993416980407522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (6531270611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138336 + ... + 179441.

It is an arithmetic number, because the mean of its divisors is an integer number (320320224).

Almost surely, 2^6531270681 is an apocalyptic number.

It is an amenable number.

6531270681 is a deficient number, since it is larger than the sum of its proper divisors (3718976487).

6531270681 is a wasteful number, since it uses less digits than its factorization.

6531270681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317841.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 6531270681 is about 80816.2773270336. The cubic root of 6531270681 is about 1869.2435653892.

The spelling of 6531270681 in words is "six billion, five hundred thirty-one million, two hundred seventy thousand, six hundred eighty-one".