260415643 has 4 divisors (see below), whose sum is σ = 260821288. Its totient is φ = 260010000.

The previous prime is 260415629. The next prime is 260415709. The reversal of 260415643 is 346514062.

260415643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260415643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260418643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201858 + ... + 203143.

It is an arithmetic number, because the mean of its divisors is an integer number (65205322).

Almost surely, 2^260415643 is an apocalyptic number.

260415643 is a deficient number, since it is larger than the sum of its proper divisors (405645).

260415643 is an equidigital number, since it uses as much as digits as its factorization.

260415643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405644.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 260415643 is about 16137.3988920148. The cubic root of 260415643 is about 638.5903569184.

It can be divided in two parts, 26041 and 5643, that added together give a square (31684 = 178²).

The spelling of 260415643 in words is "two hundred sixty million, four hundred fifteen thousand, six hundred forty-three".