265985284513 has 16 divisors (see below), whose sum is σ = 295415228416. Its totient is φ = 237926626560.

The previous prime is 265985284463. The next prime is 265985284517. The reversal of 265985284513 is 315482589562.

It is a cyclic number.

It is not a de Polignac number, because 265985284513 - 2⁹ = 265985284001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265985284517) 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, 1802328 + ... + 1944313.

It is an arithmetic number, because the mean of its divisors is an integer number (18463451776).

Almost surely, 2^265985284513 is an apocalyptic number.

It is an amenable number.

265985284513 is a deficient number, since it is larger than the sum of its proper divisors (29429943903).

265985284513 is a wasteful number, since it uses less digits than its factorization.

265985284513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746824.

The product of its digits is 20736000, while the sum is 58.

The spelling of 265985284513 in words is "two hundred sixty-five billion, nine hundred eighty-five million, two hundred eighty-four thousand, five hundred thirteen".