260861609 has 8 divisors (see below), whose sum is σ = 267617280. Its totient is φ = 254156256.

The previous prime is 260861593. The next prime is 260861633. The reversal of 260861609 is 906168062.

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

It is a cyclic number.

It is not a de Polignac number, because 260861609 - 2⁴ = 260861593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260821609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964 + ... + 22925.

It is an arithmetic number, because the mean of its divisors is an integer number (33452160).

Almost surely, 2^260861609 is an apocalyptic number.

It is an amenable number.

260861609 is a deficient number, since it is larger than the sum of its proper divisors (6755671).

260861609 is a wasteful number, since it uses less digits than its factorization.

260861609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25159.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 260861609 is about 16151.2107595685. The cubic root of 260861609 is about 638.9546811316.

The spelling of 260861609 in words is "two hundred sixty million, eight hundred sixty-one thousand, six hundred nine".