2161723895 has 8 divisors (see below), whose sum is σ = 2596088880. Its totient is φ = 1728032320.

The previous prime is 2161723873. The next prime is 2161723901. The reversal of 2161723895 is 5983271612.

2161723895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2161723895 - 2¹⁸ = 2161461751 is a prime.

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, 161261 + ... + 174150.

It is an arithmetic number, because the mean of its divisors is an integer number (324511110).

Almost surely, 2^2161723895 is an apocalyptic number.

2161723895 is a deficient number, since it is larger than the sum of its proper divisors (434364985).

2161723895 is a wasteful number, since it uses less digits than its factorization.

2161723895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336705.

The product of its digits is 181440, while the sum is 44.

The square root of 2161723895 is about 46494.3426128384. The cubic root of 2161723895 is about 1293.0046132391.

The spelling of 2161723895 in words is "two billion, one hundred sixty-one million, seven hundred twenty-three thousand, eight hundred ninety-five".