2081388518779 has 2 divisors, whose sum is σ = 2081388518780. Its totient is φ = 2081388518778.

The previous prime is 2081388518719. The next prime is 2081388518873. The reversal of 2081388518779 is 9778158831802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081388518779 is a prime.

It is a super-2 number, since 2×2081388518779² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2081388518719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040694259389 + 1040694259390.

It is an arithmetic number, because the mean of its divisors is an integer number (1040694259390).

Almost surely, 2^{2081388518779} is an apocalyptic number.

2081388518779 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081388518779 is an equidigital number, since it uses as much as digits as its factorization.

2081388518779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 67.

The spelling of 2081388518779 in words is "two trillion, eighty-one billion, three hundred eighty-eight million, five hundred eighteen thousand, seven hundred seventy-nine".