2161974170 has 32 divisors (see below), whose sum is σ = 3964593600. Its totient is φ = 848611456.

The previous prime is 2161974161. The next prime is 2161974173. The reversal of 2161974170 is 714791612.

It is not an unprimeable number, because it can be changed into a prime (2161974173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361061 + ... + 366999.

It is an arithmetic number, because the mean of its divisors is an integer number (123893550).

Almost surely, 2^2161974170 is an apocalyptic number.

2161974170 is a deficient number, since it is larger than the sum of its proper divisors (1802619430).

2161974170 is a wasteful number, since it uses less digits than its factorization.

2161974170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 2161974170 is about 46497.0339914279. The cubic root of 2161974170 is about 1293.0545107989.

The spelling of 2161974170 in words is "two billion, one hundred sixty-one million, nine hundred seventy-four thousand, one hundred seventy".