648338027691659 has 2 divisors, whose sum is σ = 648338027691660. Its totient is φ = 648338027691658.

The previous prime is 648338027691631. The next prime is 648338027691661. The reversal of 648338027691659 is 956196720833846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648338027691659 - 2⁴⁸ = 366863050981003 is a prime.

It is a super-2 number, since 2×648338027691659² (a number of 30 digits) contains 22 as substring.

Together with 648338027691661, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648338027691659.

It is not a weakly prime, because it can be changed into another prime (648338027691619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324169013845829 + 324169013845830.

It is an arithmetic number, because the mean of its divisors is an integer number (324169013845830).

It is a 1-persistent number, because it is pandigital, but 2⋅648338027691659 = 1296676055383318 is not.

Almost surely, 2^{648338027691659} is an apocalyptic number.

648338027691659 is a deficient number, since it is larger than the sum of its proper divisors (1).

648338027691659 is an equidigital number, since it uses as much as digits as its factorization.

648338027691659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2821754880, while the sum is 77.

The spelling of 648338027691659 in words is "six hundred forty-eight trillion, three hundred thirty-eight billion, twenty-seven million, six hundred ninety-one thousand, six hundred fifty-nine".