260401811 has 4 divisors (see below), whose sum is σ = 260434152. Its totient is φ = 260369472.

The previous prime is 260401789. The next prime is 260401853. The reversal of 260401811 is 118104062.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 260401811 - 2⁶ = 260401747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260401111) 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, 6536 + ... + 23738.

It is an arithmetic number, because the mean of its divisors is an integer number (65108538).

Almost surely, 2^260401811 is an apocalyptic number.

260401811 is a deficient number, since it is larger than the sum of its proper divisors (32341).

260401811 is a wasteful number, since it uses less digits than its factorization.

260401811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32340.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 260401811 is about 16136.9703166363. The cubic root of 260401811 is about 638.5790504571.

Adding to 260401811 its reverse (118104062), we get a palindrome (378505873).

The spelling of 260401811 in words is "two hundred sixty million, four hundred one thousand, eight hundred eleven".