2161727160 has 32 divisors (see below), whose sum is σ = 6485181840. Its totient is φ = 576460544.

The previous prime is 2161727149. The next prime is 2161727179. The reversal of 2161727160 is 617271612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9007077 + ... + 9007316.

Almost surely, 2^2161727160 is an apocalyptic number.

2161727160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161727160 is an abundant number, since it is smaller than the sum of its proper divisors (4323454680).

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

2161727160 is a wasteful number, since it uses less digits than its factorization.

2161727160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18014407 (or 18014403 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 2161727160 is about 46494.3777246239. The cubic root of 2161727160 is about 1293.0052642100.

Adding to 2161727160 its reverse (617271612), we get a palindrome (2778998772).

The spelling of 2161727160 in words is "two billion, one hundred sixty-one million, seven hundred twenty-seven thousand, one hundred sixty".