260687028865 has 8 divisors (see below), whose sum is σ = 312939756648. Its totient is φ = 208472741760.

The previous prime is 260687028821. The next prime is 260687028869. The reversal of 260687028865 is 568820786062.

It can be written as a sum of positive squares in 4 ways, for example, as 121402071184 + 139284957681 = 348428^2 + 373209^2 .

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

It is not a de Polignac number, because 260687028865 - 2⁷ = 260687028737 is a prime.

It is a super-2 number, since 2×260687028865² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260687028869) 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, 9595246 + ... + 9622375.

It is an arithmetic number, because the mean of its divisors is an integer number (39117469581).

Almost surely, 2^260687028865 is an apocalyptic number.

It is an amenable number.

260687028865 is a deficient number, since it is larger than the sum of its proper divisors (52252727783).

260687028865 is a wasteful number, since it uses less digits than its factorization.

260687028865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19220339.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 260687028865 in words is "two hundred sixty billion, six hundred eighty-seven million, twenty-eight thousand, eight hundred sixty-five".