64780518611 has 2 divisors, whose sum is σ = 64780518612. Its totient is φ = 64780518610.

The previous prime is 64780518589. The next prime is 64780518667. The reversal of 64780518611 is 11681508746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64780518611 - 2⁶ = 64780518547 is a prime.

It is not a weakly prime, because it can be changed into another prime (64780518511) 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 as a sum of consecutive naturals, namely, 32390259305 + 32390259306.

It is an arithmetic number, because the mean of its divisors is an integer number (32390259306).

Almost surely, 2^64780518611 is an apocalyptic number.

64780518611 is a deficient number, since it is larger than the sum of its proper divisors (1).

64780518611 is an equidigital number, since it uses as much as digits as its factorization.

64780518611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 64780518611 in words is "sixty-four billion, seven hundred eighty million, five hundred eighteen thousand, six hundred eleven".