260564165 has 8 divisors (see below), whose sum is σ = 318576888. Its totient is φ = 204518080.

The previous prime is 260564149. The next prime is 260564189. The reversal of 260564165 is 561465062.

It is a Cunningham number, because it is equal to 16142²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1965604 + 258598561 = 1402^2 + 16081^2 .

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

It is not a de Polignac number, because 260564165 - 2⁴ = 260564149 is a prime.

It is a Duffinian number.

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, 491366 + ... + 491895.

It is an arithmetic number, because the mean of its divisors is an integer number (39822111).

Almost surely, 2^260564165 is an apocalyptic number.

It is an amenable number.

260564165 is a deficient number, since it is larger than the sum of its proper divisors (58012723).

260564165 is an equidigital number, since it uses as much as digits as its factorization.

260564165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983319.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 260564165 is about 16142.0000309751. Note that the first 4 decimals coincide. The cubic root of 260564165 is about 638.7117355611.

The spelling of 260564165 in words is "two hundred sixty million, five hundred sixty-four thousand, one hundred sixty-five".