260204323521 has 4 divisors (see below), whose sum is σ = 346939098032. Its totient is φ = 173469549012.

The previous prime is 260204323499. The next prime is 260204323523. The reversal of 260204323521 is 125323402062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 260204323521 - 2²³ = 260195934913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260204323523) 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, 43367387251 + ... + 43367387256.

It is an arithmetic number, because the mean of its divisors is an integer number (86734774508).

Almost surely, 2^260204323521 is an apocalyptic number.

It is an amenable number.

260204323521 is a deficient number, since it is larger than the sum of its proper divisors (86734774511).

260204323521 is an equidigital number, since it uses as much as digits as its factorization.

260204323521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86734774510.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 260204323521 its reverse (125323402062), we get a palindrome (385527725583).

The spelling of 260204323521 in words is "two hundred sixty billion, two hundred four million, three hundred twenty-three thousand, five hundred twenty-one".