1648984720399 has 2 divisors, whose sum is σ = 1648984720400. Its totient is φ = 1648984720398.

The previous prime is 1648984720379. The next prime is 1648984720433. The reversal of 1648984720399 is 9930274898461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1648984720399 - 2²¹ = 1648982623247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648984720319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824492360199 + 824492360200.

It is an arithmetic number, because the mean of its divisors is an integer number (824492360200).

Almost surely, 2^{1648984720399} is an apocalyptic number.

1648984720399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648984720399 is an equidigital number, since it uses as much as digits as its factorization.

1648984720399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188116992, while the sum is 70.

The spelling of 1648984720399 in words is "one trillion, six hundred forty-eight billion, nine hundred eighty-four million, seven hundred twenty thousand, three hundred ninety-nine".