6545405729 has 2 divisors, whose sum is σ = 6545405730. Its totient is φ = 6545405728.

The previous prime is 6545405719. The next prime is 6545405759. The reversal of 6545405729 is 9275045456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5030639329 + 1514766400 = 70927^2 + 38920^2 .

It is a cyclic number.

It is not a de Polignac number, because 6545405729 - 2²⁰ = 6544357153 is a prime.

It is not a weakly prime, because it can be changed into another prime (6545405719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272702864 + 3272702865.

It is an arithmetic number, because the mean of its divisors is an integer number (3272702865).

Almost surely, 2^6545405729 is an apocalyptic number.

It is an amenable number.

6545405729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6545405729 is an equidigital number, since it uses as much as digits as its factorization.

6545405729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The square root of 6545405729 is about 80903.6818012629. The cubic root of 6545405729 is about 1870.5910729354.

The spelling of 6545405729 in words is "six billion, five hundred forty-five million, four hundred five thousand, seven hundred twenty-nine".