2081388518871 has 16 divisors (see below), whose sum is σ = 2860313084160. Its totient is φ = 1345443410880.

The previous prime is 2081388518779. The next prime is 2081388518873. The reversal of 2081388518871 is 1788158831802.

It is not a de Polignac number, because 2081388518871 - 2¹⁰ = 2081388517847 is a prime.

It is a super-2 number, since 2×2081388518871² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081388518873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51887491 + ... + 51927588.

It is an arithmetic number, because the mean of its divisors is an integer number (178769567760).

Almost surely, 2^{2081388518871} is an apocalyptic number.

2081388518871 is a deficient number, since it is larger than the sum of its proper divisors (778924565289).

2081388518871 is a wasteful number, since it uses less digits than its factorization.

2081388518871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103815286.

The product of its (nonzero) digits is 6881280, while the sum is 60.

The spelling of 2081388518871 in words is "two trillion, eighty-one billion, three hundred eighty-eight million, five hundred eighteen thousand, eight hundred seventy-one".