260645616 has 180 divisors, whose sum is σ = 916757296. Its totient is φ = 67668480.

The previous prime is 260645599. The next prime is 260645621. The reversal of 260645616 is 616546062.

It is a happy number.

260645616 is a `hidden beast` number, since 2 + 6 + 0 + 645 + 6 + 1 + 6 = 666.

It is a super-2 number, since 2×260645616² = 135872274280038912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 120900 + ... + 123036.

Almost surely, 2^260645616 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 260645616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458378648).

260645616 is an abundant number, since it is smaller than the sum of its proper divisors (656111680).

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

260645616 is a wasteful number, since it uses less digits than its factorization.

260645616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 260645616 is about 16144.5227863818. The cubic root of 260645616 is about 638.7782812809.

The spelling of 260645616 in words is "two hundred sixty million, six hundred forty-five thousand, six hundred sixteen".