2001771180 has 36 divisors (see below), whose sum is σ = 6072039792. Its totient is φ = 533805600.

The previous prime is 2001771169. The next prime is 2001771209. The reversal of 2001771180 is 811771002.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5560296 + ... + 5560655.

It is an arithmetic number, because the mean of its divisors is an integer number (168667772).

Almost surely, 2^2001771180 is an apocalyptic number.

2001771180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001771180 is an abundant number, since it is smaller than the sum of its proper divisors (4070268612).

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

2001771180 is a wasteful number, since it uses less digits than its factorization.

2001771180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120966 (or 11120961 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 2001771180 is about 44741.1575621373. The cubic root of 2001771180 is about 1260.2928646522.

The spelling of 2001771180 in words is "two billion, one million, seven hundred seventy-one thousand, one hundred eighty".