2165680929 has 16 divisors (see below), whose sum is σ = 2968442048. Its totient is φ = 1403428032.

The previous prime is 2165680919. The next prime is 2165680931. The reversal of 2165680929 is 9290865612.

It is not a de Polignac number, because 2165680929 - 2¹³ = 2165672737 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165680919) 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, 115254 + ... + 132720.

It is an arithmetic number, because the mean of its divisors is an integer number (185527628).

Almost surely, 2^2165680929 is an apocalyptic number.

It is an amenable number.

2165680929 is a deficient number, since it is larger than the sum of its proper divisors (802761119).

2165680929 is a wasteful number, since it uses less digits than its factorization.

2165680929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18624.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 2165680929 is about 46536.8770868867. The cubic root of 2165680929 is about 1293.7930803363.

The spelling of 2165680929 in words is "two billion, one hundred sixty-five million, six hundred eighty thousand, nine hundred twenty-nine".