6491535481 has 8 divisors (see below), whose sum is σ = 6534930528. Its totient is φ = 6448260000.

The previous prime is 6491535469. The next prime is 6491535499. The reversal of 6491535481 is 1845351946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6491535481 - 2⁷ = 6491535353 is a prime.

It is a super-2 number, since 2×6491535481² = 84280065802163802722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491535581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80406 + ... + 139456.

It is an arithmetic number, because the mean of its divisors is an integer number (816866316).

Almost surely, 2^6491535481 is an apocalyptic number.

It is an amenable number.

6491535481 is a deficient number, since it is larger than the sum of its proper divisors (43395047).

6491535481 is a wasteful number, since it uses less digits than its factorization.

6491535481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59783.

The product of its digits is 518400, while the sum is 46.

The square root of 6491535481 is about 80570.0656633715. The cubic root of 6491535481 is about 1865.4451262098.

The spelling of 6491535481 in words is "six billion, four hundred ninety-one million, five hundred thirty-five thousand, four hundred eighty-one".