6545709801 has 12 divisors (see below), whose sum is σ = 10011085812. Its totient is φ = 4107111936.

The previous prime is 6545709763. The next prime is 6545709809. The reversal of 6545709801 is 1089075456.

It can be written as a sum of positive squares in 2 ways, for example, as 4757688576 + 1788021225 = 68976^2 + 42285^2 .

It is not a de Polignac number, because 6545709801 - 2²⁵ = 6512155369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6545709809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21391056 + ... + 21391361.

It is an arithmetic number, because the mean of its divisors is an integer number (834257151).

Almost surely, 2^6545709801 is an apocalyptic number.

It is an amenable number.

6545709801 is a deficient number, since it is larger than the sum of its proper divisors (3465376011).

6545709801 is a wasteful number, since it uses less digits than its factorization.

6545709801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42782440 (or 42782437 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 6545709801 is about 80905.5610017012. The cubic root of 6545709801 is about 1870.6200390828.

The spelling of 6545709801 in words is "six billion, five hundred forty-five million, seven hundred nine thousand, eight hundred one".