6540852691 has 2 divisors, whose sum is σ = 6540852692. Its totient is φ = 6540852690.

The previous prime is 6540852653. The next prime is 6540852737. The reversal of 6540852691 is 1962580456.

It is an a-pointer prime, because the next prime (6540852737) can be obtained adding 6540852691 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6540852691 - 2⁹ = 6540852179 is a prime.

It is not a weakly prime, because it can be changed into another prime (6540855691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270426345 + 3270426346.

It is an arithmetic number, because the mean of its divisors is an integer number (3270426346).

Almost surely, 2^6540852691 is an apocalyptic number.

6540852691 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540852691 is an equidigital number, since it uses as much as digits as its factorization.

6540852691 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6540852691 is about 80875.5382733246. The cubic root of 6540852691 is about 1870.1572394876.

The spelling of 6540852691 in words is "six billion, five hundred forty million, eight hundred fifty-two thousand, six hundred ninety-one".