260564556 has 144 divisors (see below), whose sum is σ = 756120960. Its totient is φ = 69431040.

The previous prime is 260564519. The next prime is 260564567. The reversal of 260564556 is 655465062.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 927136 + ... + 927416.

It is an arithmetic number, because the mean of its divisors is an integer number (5250840).

Almost surely, 2^260564556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260564556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378060480).

260564556 is an abundant number, since it is smaller than the sum of its proper divisors (495556404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260564556 is a wasteful number, since it uses less digits than its factorization.

260564556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 260564556 is about 16142.0121422331. The cubic root of 260564556 is about 638.7120550425.

It can be divided in two parts, 2605 and 64556, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 260564556 in words is "two hundred sixty million, five hundred sixty-four thousand, five hundred fifty-six".