2063161721 has 8 divisors (see below), whose sum is σ = 2172166080. Its totient is φ = 1954199088.

The previous prime is 2063161691. The next prime is 2063161729. The reversal of 2063161721 is 1271613602.

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 2063161721 - 2³⁰ = 989419897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2063161729) 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, 189395 + ... + 199991.

It is an arithmetic number, because the mean of its divisors is an integer number (271520760).

Almost surely, 2^2063161721 is an apocalyptic number.

It is an amenable number.

2063161721 is a deficient number, since it is larger than the sum of its proper divisors (109004359).

2063161721 is a wasteful number, since it uses less digits than its factorization.

2063161721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2063161721 is about 45422.0400356479. The cubic root of 2063161721 is about 1273.0469590647.

The spelling of 2063161721 in words is "two billion, sixty-three million, one hundred sixty-one thousand, seven hundred twenty-one".