260646242405 has 8 divisors (see below), whose sum is σ = 312793582200. Its totient is φ = 208504933056.

The previous prime is 260646242401. The next prime is 260646242407. The reversal of 260646242405 is 504242646062.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13501045636 + 247145196769 = 116194^2 + 497137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 260646242405 - 2² = 260646242401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260646242401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411970 + ... + 1585859.

It is an arithmetic number, because the mean of its divisors is an integer number (39099197775).

Almost surely, 2^260646242405 is an apocalyptic number.

It is an amenable number.

260646242405 is a deficient number, since it is larger than the sum of its proper divisors (52147339795).

260646242405 is a wasteful number, since it uses less digits than its factorization.

260646242405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015223.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 260646242405 its reverse (504242646062), we get a palindrome (764888888467).

The spelling of 260646242405 in words is "two hundred sixty billion, six hundred forty-six million, two hundred forty-two thousand, four hundred five".