260756633521 has 4 divisors (see below), whose sum is σ = 263898279792. Its totient is φ = 257614987252.

The previous prime is 260756633509. The next prime is 260756633587. The reversal of 260756633521 is 125336657062.

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 a cyclic number.

It is not a de Polignac number, because 260756633521 - 2²¹ = 260754536369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260756634521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1570823011 + ... + 1570823176.

It is an arithmetic number, because the mean of its divisors is an integer number (65974569948).

Almost surely, 2^260756633521 is an apocalyptic number.

It is an amenable number.

260756633521 is a deficient number, since it is larger than the sum of its proper divisors (3141646271).

260756633521 is an equidigital number, since it uses as much as digits as its factorization.

260756633521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141646270.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 260756633521 in words is "two hundred sixty billion, seven hundred fifty-six million, six hundred thirty-three thousand, five hundred twenty-one".