2148861681803 has 2 divisors, whose sum is σ = 2148861681804. Its totient is φ = 2148861681802.

The previous prime is 2148861681739. The next prime is 2148861681929. The reversal of 2148861681803 is 3081861688412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2148861681803 - 2⁶ = 2148861681739 is a prime.

It is not a weakly prime, because it can be changed into another prime (2148861681203) 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, 1074430840901 + 1074430840902.

It is an arithmetic number, because the mean of its divisors is an integer number (1074430840902).

Almost surely, 2^{2148861681803} is an apocalyptic number.

2148861681803 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148861681803 is an equidigital number, since it uses as much as digits as its factorization.

2148861681803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3538944, while the sum is 56.

The spelling of 2148861681803 in words is "two trillion, one hundred forty-eight billion, eight hundred sixty-one million, six hundred eighty-one thousand, eight hundred three".