6495987481 has 2 divisors, whose sum is σ = 6495987482. Its totient is φ = 6495987480.

The previous prime is 6495987467. The next prime is 6495987493. The reversal of 6495987481 is 1847895946.

6495987481 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6481699081 + 14288400 = 80509^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 6495987481 - 2¹⁹ = 6495463193 is a prime.

It is a super-2 number, since 2×6495987481² = 84395706706617450722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6495987401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247993740 + 3247993741.

It is an arithmetic number, because the mean of its divisors is an integer number (3247993741).

Almost surely, 2^6495987481 is an apocalyptic number.

It is an amenable number.

6495987481 is a deficient number, since it is larger than the sum of its proper divisors (1).

6495987481 is an equidigital number, since it uses as much as digits as its factorization.

6495987481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 61.

The square root of 6495987481 is about 80597.6890549599. The cubic root of 6495987481 is about 1865.8714795685.

The spelling of 6495987481 in words is "six billion, four hundred ninety-five million, nine hundred eighty-seven thousand, four hundred eighty-one".