265116212565 has 16 divisors (see below), whose sum is σ = 424195204608. Its totient is φ = 141392225216.

The previous prime is 265116212539. The next prime is 265116212609. The reversal of 265116212565 is 565212611562.

It is a cyclic number.

It is not a de Polignac number, because 265116212565 - 2¹⁶ = 265116147029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629839 + ... + 962771.

It is an arithmetic number, because the mean of its divisors is an integer number (26512200288).

Almost surely, 2^265116212565 is an apocalyptic number.

It is an amenable number.

265116212565 is a deficient number, since it is larger than the sum of its proper divisors (159078992043).

265116212565 is a wasteful number, since it uses less digits than its factorization.

265116212565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386028.

The product of its digits is 216000, while the sum is 42.

The spelling of 265116212565 in words is "two hundred sixty-five billion, one hundred sixteen million, two hundred twelve thousand, five hundred sixty-five".