2081517841806 has 32 divisors (see below), whose sum is σ = 4483501424640. Its totient is φ = 640433853024.

The previous prime is 2081517841763. The next prime is 2081517841807. The reversal of 2081517841806 is 6081487151802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081517841807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 846115 + ... + 2208833.

It is an arithmetic number, because the mean of its divisors is an integer number (140109419520).

Almost surely, 2^{2081517841806} is an apocalyptic number.

2081517841806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2081517841806 is an abundant number, since it is smaller than the sum of its proper divisors (2401983582834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2081517841806 is a wasteful number, since it uses less digits than its factorization.

2081517841806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382320.

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 2081517841806 in words is "two trillion, eighty-one billion, five hundred seventeen million, eight hundred forty-one thousand, eight hundred six".