65280739639 has 2 divisors, whose sum is σ = 65280739640. Its totient is φ = 65280739638.

The previous prime is 65280739609. The next prime is 65280739679. The reversal of 65280739639 is 93693708256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65280739639 - 2¹³ = 65280731447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65280739609) 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, 32640369819 + 32640369820.

It is an arithmetic number, because the mean of its divisors is an integer number (32640369820).

Almost surely, 2^65280739639 is an apocalyptic number.

65280739639 is a deficient number, since it is larger than the sum of its proper divisors (1).

65280739639 is an equidigital number, since it uses as much as digits as its factorization.

65280739639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 58.

The spelling of 65280739639 in words is "sixty-five billion, two hundred eighty million, seven hundred thirty-nine thousand, six hundred thirty-nine".