265516912645 has 36 divisors (see below), whose sum is σ = 326667575556. Its totient is φ = 207177187840.

The previous prime is 265516912627. The next prime is 265516912673. The reversal of 265516912645 is 546219615562.

It can be written as a sum of positive squares in 6 ways, for example, as 23045365249 + 242471547396 = 151807^2 + 492414^2 .

It is not a de Polignac number, because 265516912645 - 2¹⁷ = 265516781573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265516912592 and 265516912601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 944899905 + ... + 944900185.

It is an arithmetic number, because the mean of its divisors is an integer number (9074099321).

Almost surely, 2^265516912645 is an apocalyptic number.

It is an amenable number.

265516912645 is a deficient number, since it is larger than the sum of its proper divisors (61150662911).

265516912645 is an frugal number, since it uses more digits than its factorization.

265516912645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 578 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 52.

The spelling of 265516912645 in words is "two hundred sixty-five billion, five hundred sixteen million, nine hundred twelve thousand, six hundred forty-five".