260639165 has 16 divisors (see below), whose sum is σ = 325839360. Its totient is φ = 199920960.

The previous prime is 260639149. The next prime is 260639191. The reversal of 260639165 is 561936062.

It is not a de Polignac number, because 260639165 - 2⁴ = 260639149 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9182 + ... + 24608.

It is an arithmetic number, because the mean of its divisors is an integer number (20364960).

Almost surely, 2^260639165 is an apocalyptic number.

It is an amenable number.

260639165 is a deficient number, since it is larger than the sum of its proper divisors (65200195).

260639165 is a wasteful number, since it uses less digits than its factorization.

260639165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 260639165 is about 16144.3229960256. The cubic root of 260639165 is about 638.7730112995.

The spelling of 260639165 in words is "two hundred sixty million, six hundred thirty-nine thousand, one hundred sixty-five".