1648648581733 has 2 divisors, whose sum is σ = 1648648581734. Its totient is φ = 1648648581732.

The previous prime is 1648648581721. The next prime is 1648648581761. The reversal of 1648648581733 is 3371858468461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1640610024769 + 8038556964 = 1280863^2 + 89658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1648648581733 - 2²¹ = 1648646484581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1648648581133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824324290866 + 824324290867.

It is an arithmetic number, because the mean of its divisors is an integer number (824324290867).

Almost surely, 2^{1648648581733} is an apocalyptic number.

It is an amenable number.

1648648581733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648648581733 is an equidigital number, since it uses as much as digits as its factorization.

1648648581733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92897280, while the sum is 64.

The spelling of 1648648581733 in words is "one trillion, six hundred forty-eight billion, six hundred forty-eight million, five hundred eighty-one thousand, seven hundred thirty-three".