260144609 has 6 divisors (see below), whose sum is σ = 261206946. Its totient is φ = 259086560.

The previous prime is 260144593. The next prime is 260144611. The reversal of 260144609 is 906441062.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 216913984 + 43230625 = 14728^2 + 6575^2 .

It is not a de Polignac number, because 260144609 - 2⁴ = 260144593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260144699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67289 + ... + 71049.

It is an arithmetic number, because the mean of its divisors is an integer number (43534491).

Almost surely, 2^260144609 is an apocalyptic number.

It is an amenable number.

260144609 is a deficient number, since it is larger than the sum of its proper divisors (1062337).

260144609 is an frugal number, since it uses more digits than its factorization.

260144609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 260144609 is about 16128.9990079980. Note that the first 3 decimals coincide. The cubic root of 260144609 is about 638.3687371299.

Adding to 260144609 its sum of digits (32), we get a 4-th power (260144641 = 127⁴).

The spelling of 260144609 in words is "two hundred sixty million, one hundred forty-four thousand, six hundred nine".