855253260261 has 12 divisors (see below), whose sum is σ = 1235423577388. Its totient is φ = 570142183104.

The previous prime is 855253260187. The next prime is 855253260341. The reversal of 855253260261 is 162062352558.

855253260261 is a `hidden beast` number, since 8 + 5 + 5 + 2 + 5 + 32 + 602 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52123629636 + 803129630625 = 228306^2 + 896175^2 .

It is not a de Polignac number, because 855253260261 - 2²⁶ = 855186151397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855253280261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2017240 + ... + 2404113.

Almost surely, 2^855253260261 is an apocalyptic number.

It is an amenable number.

855253260261 is a deficient number, since it is larger than the sum of its proper divisors (380170317127).

855253260261 is a wasteful number, since it uses less digits than its factorization.

855253260261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442852 (or 4442849 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 855253260261 in words is "eight hundred fifty-five billion, two hundred fifty-three million, two hundred sixty thousand, two hundred sixty-one".