64534805273 has 4 divisors (see below), whose sum is σ = 64536074880. Its totient is φ = 64533535668.

The previous prime is 64534805201. The next prime is 64534805311. The reversal of 64534805273 is 37250843546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64534805273 - 2¹⁴ = 64534788889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64534805173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555233 + ... + 661326.

It is an arithmetic number, because the mean of its divisors is an integer number (16134018720).

Almost surely, 2^64534805273 is an apocalyptic number.

It is an amenable number.

64534805273 is a deficient number, since it is larger than the sum of its proper divisors (1269607).

64534805273 is a wasteful number, since it uses less digits than its factorization.

64534805273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269606.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 64534805273 in words is "sixty-four billion, five hundred thirty-four million, eight hundred five thousand, two hundred seventy-three".