64465321206541 has 4 divisors (see below), whose sum is σ = 64548717483132. Its totient is φ = 64381924929952.

The previous prime is 64465321206529. The next prime is 64465321206563. The reversal of 64465321206541 is 14560212356446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13012101058441 + 51453220148100 = 3607229^2 + 7173090^2 .

It is a cyclic number.

It is not a de Polignac number, because 64465321206541 - 2²⁹ = 64464784335629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64465321206581) 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 3 ways as a sum of consecutive naturals, for example, 41698137136 + ... + 41698138681.

It is an arithmetic number, because the mean of its divisors is an integer number (16137179370783).

Almost surely, 2^{64465321206541} is an apocalyptic number.

It is an amenable number.

64465321206541 is a deficient number, since it is larger than the sum of its proper divisors (83396276591).

64465321206541 is an equidigital number, since it uses as much as digits as its factorization.

64465321206541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83396276590.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 64465321206541 in words is "sixty-four trillion, four hundred sixty-five billion, three hundred twenty-one million, two hundred six thousand, five hundred forty-one".