260521533425 has 24 divisors (see below), whose sum is σ = 332613874296. Its totient is φ = 202273251840.

The previous prime is 260521533397. The next prime is 260521533473. The reversal of 260521533425 is 524335125062.

It can be written as a sum of positive squares in 12 ways, for example, as 62346094864 + 198175438561 = 249692^2 + 445169^2 .

It is not a de Polignac number, because 260521533425 - 2¹⁸ = 260521271281 is a prime.

It is a super-2 number, since 2×260521533425² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12509 + ... + 721941.

It is an arithmetic number, because the mean of its divisors is an integer number (13858911429).

Almost surely, 2^260521533425 is an apocalyptic number.

260521533425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

260521533425 is a deficient number, since it is larger than the sum of its proper divisors (72092340871).

260521533425 is a wasteful number, since it uses less digits than its factorization.

260521533425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709877 (or 709872 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 260521533425 its reverse (524335125062), we get a palindrome (784856658487).

The spelling of 260521533425 in words is "two hundred sixty billion, five hundred twenty-one million, five hundred thirty-three thousand, four hundred twenty-five".