2081871779 has 8 divisors (see below), whose sum is σ = 2243416560. Its totient is φ = 1920527136.

The previous prime is 2081871773. The next prime is 2081871791. The reversal of 2081871779 is 9771781802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2081871779 - 2²⁰ = 2080823203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081871773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28064 + ... + 70365.

It is an arithmetic number, because the mean of its divisors is an integer number (280427070).

Almost surely, 2^2081871779 is an apocalyptic number.

2081871779 is a deficient number, since it is larger than the sum of its proper divisors (161544781).

2081871779 is a wasteful number, since it uses less digits than its factorization.

2081871779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100069.

The product of its (nonzero) digits is 395136, while the sum is 50.

The square root of 2081871779 is about 45627.5331242003. The cubic root of 2081871779 is about 1276.8836500199.

The spelling of 2081871779 in words is "two billion, eighty-one million, eight hundred seventy-one thousand, seven hundred seventy-nine".