2081388518873 has 2 divisors, whose sum is σ = 2081388518874. Its totient is φ = 2081388518872.

The previous prime is 2081388518779. The next prime is 2081388518887. The reversal of 2081388518873 is 3788158831802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1749580262089 + 331808256784 = 1322717^2 + 576028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081388518873 - 2¹⁴ = 2081388502489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2081388518893) 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, 1040694259436 + 1040694259437.

It is an arithmetic number, because the mean of its divisors is an integer number (1040694259437).

Almost surely, 2^{2081388518873} is an apocalyptic number.

It is an amenable number.

2081388518873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081388518873 is an equidigital number, since it uses as much as digits as its factorization.

2081388518873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20643840, while the sum is 62.

The spelling of 2081388518873 in words is "two trillion, eighty-one billion, three hundred eighty-eight million, five hundred eighteen thousand, eight hundred seventy-three".