2061581171 has 8 divisors (see below), whose sum is σ = 2221188144. Its totient is φ = 1902120480.

The previous prime is 2061581107. The next prime is 2061581183. The reversal of 2061581171 is 1711851602.

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

It is not a de Polignac number, because 2061581171 - 2⁶ = 2061581107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061581371) 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 7 ways as a sum of consecutive naturals, for example, 6365 + ... + 64526.

It is an arithmetic number, because the mean of its divisors is an integer number (277648518).

Almost surely, 2^2061581171 is an apocalyptic number.

2061581171 is a deficient number, since it is larger than the sum of its proper divisors (159606973).

2061581171 is a wasteful number, since it uses less digits than its factorization.

2061581171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73141.

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 2061581171 is about 45404.6382102093. The cubic root of 2061581171 is about 1272.7217901126.

The spelling of 2061581171 in words is "two billion, sixty-one million, five hundred eighty-one thousand, one hundred seventy-one".