64563242873 has 2 divisors, whose sum is σ = 64563242874. Its totient is φ = 64563242872.

The previous prime is 64563242869. The next prime is 64563242911. The reversal of 64563242873 is 37824236546.

64563242873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47904952384 + 16658290489 = 218872^2 + 129067^2 .

It is a cyclic number.

It is not a de Polignac number, because 64563242873 - 2² = 64563242869 is a prime.

It is not a weakly prime, because it can be changed into another prime (64563242813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32281621436 + 32281621437.

It is an arithmetic number, because the mean of its divisors is an integer number (32281621437).

Almost surely, 2^64563242873 is an apocalyptic number.

It is an amenable number.

64563242873 is a deficient number, since it is larger than the sum of its proper divisors (1).

64563242873 is an equidigital number, since it uses as much as digits as its factorization.

64563242873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 50.

The spelling of 64563242873 in words is "sixty-four billion, five hundred sixty-three million, two hundred forty-two thousand, eight hundred seventy-three".