6540462569 has 2 divisors, whose sum is σ = 6540462570. Its totient is φ = 6540462568.

The previous prime is 6540462541. The next prime is 6540462601. The reversal of 6540462569 is 9652640456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5880589225 + 659873344 = 76685^2 + 25688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540462569 is a prime.

It is a super-2 number, since 2×6540462569² = 85555301232980159522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6540468569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270231284 + 3270231285.

It is an arithmetic number, because the mean of its divisors is an integer number (3270231285).

Almost surely, 2^6540462569 is an apocalyptic number.

It is an amenable number.

6540462569 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540462569 is an equidigital number, since it uses as much as digits as its factorization.

6540462569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The square root of 6540462569 is about 80873.1263708780. The cubic root of 6540462569 is about 1870.1200575878.

The spelling of 6540462569 in words is "six billion, five hundred forty million, four hundred sixty-two thousand, five hundred sixty-nine".