260639859841 has 3 divisors (see below), whose sum is σ = 260640370371. Its totient is φ = 260639349312.

The previous prime is 260639859833. The next prime is 260639859853. The reversal of 260639859841 is 148958936062.

The square root of 260639859841 is 510529.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 156285018241 + 104354841600 = 395329^2 + 323040^2 .

It is not a de Polignac number, because 260639859841 - 2³ = 260639859833 is a prime.

It is a super-2 number, since 2×260639859841² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260639859841.

It is not an unprimeable number, because it can be changed into a prime (260639859041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 255265 + ... + 765793.

It is an arithmetic number, because the mean of its divisors is an integer number (86880123457).

Almost surely, 2^260639859841 is an apocalyptic number.

260639859841 is the 510529-th square number.

260639859841 is the 255265-th centered octagonal number.

It is an amenable number.

260639859841 is a deficient number, since it is larger than the sum of its proper divisors (510530).

260639859841 is an frugal number, since it uses more digits than its factorization.

260639859841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021058 (or 510529 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 260639859841 in words is "two hundred sixty billion, six hundred thirty-nine million, eight hundred fifty-nine thousand, eight hundred forty-one".