2081721446 has 8 divisors (see below), whose sum is σ = 3568665360. Its totient is φ = 892166328.

The previous prime is 2081721427. The next prime is 2081721457. The reversal of 2081721446 is 6441271802.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74347181 + ... + 74347208.

It is an arithmetic number, because the mean of its divisors is an integer number (446083170).

Almost surely, 2^2081721446 is an apocalyptic number.

2081721446 is a deficient number, since it is larger than the sum of its proper divisors (1486943914).

2081721446 is a wasteful number, since it uses less digits than its factorization.

2081721446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148694398.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 2081721446 is about 45625.8857009922. The cubic root of 2081721446 is about 1276.8529144783.

The spelling of 2081721446 in words is "two billion, eighty-one million, seven hundred twenty-one thousand, four hundred forty-six".