6491007533 has 2 divisors, whose sum is σ = 6491007534. Its totient is φ = 6491007532.

The previous prime is 6491007527. The next prime is 6491007631. The reversal of 6491007533 is 3357001946.

It is a happy number.

6491007533 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6400320004 + 90687529 = 80002^2 + 9523^2 .

It is a cyclic number.

It is not a de Polignac number, because 6491007533 - 2⁸ = 6491007277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6491009533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245503766 + 3245503767.

It is an arithmetic number, because the mean of its divisors is an integer number (3245503767).

Almost surely, 2^6491007533 is an apocalyptic number.

It is an amenable number.

6491007533 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491007533 is an equidigital number, since it uses as much as digits as its factorization.

6491007533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 6491007533 is about 80566.7892682835. The cubic root of 6491007533 is about 1865.3945534433.

The spelling of 6491007533 in words is "six billion, four hundred ninety-one million, seven thousand, five hundred thirty-three".