2166723832 has 64 divisors (see below), whose sum is σ = 5217569280. Its totient is φ = 819891072.

The previous prime is 2166723821. The next prime is 2166723851. The reversal of 2166723832 is 2383276612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47958 + ... + 81445.

It is an arithmetic number, because the mean of its divisors is an integer number (81524520).

Almost surely, 2^2166723832 is an apocalyptic number.

It is an amenable number.

2166723832 is an abundant number, since it is smaller than the sum of its proper divisors (3050845448).

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

2166723832 is a wasteful number, since it uses less digits than its factorization.

2166723832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129452 (or 129448 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 2166723832 is about 46548.0808626951. The cubic root of 2166723832 is about 1294.0007262143. Note that the first 3 decimals are identical.

The spelling of 2166723832 in words is "two billion, one hundred sixty-six million, seven hundred twenty-three thousand, eight hundred thirty-two".