265981251255 has 16 divisors (see below), whose sum is σ = 425785092480. Its totient is φ = 141784970528.

The previous prime is 265981251209. The next prime is 265981251257. The reversal of 265981251255 is 552152189562.

It is a cyclic number.

It is not a de Polignac number, because 265981251255 - 2¹⁵ = 265981218487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265981251198 and 265981251207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265981251257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4450377 + ... + 4509746.

It is an arithmetic number, because the mean of its divisors is an integer number (26611568280).

Almost surely, 2^265981251255 is an apocalyptic number.

265981251255 is a deficient number, since it is larger than the sum of its proper divisors (159803841225).

265981251255 is a wasteful number, since it uses less digits than its factorization.

265981251255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962110.

The product of its digits is 2160000, while the sum is 51.

The spelling of 265981251255 in words is "two hundred sixty-five billion, nine hundred eighty-one million, two hundred fifty-one thousand, two hundred fifty-five".