265894864705 has 8 divisors (see below), whose sum is σ = 319087280232. Its totient is φ = 212706930048.

The previous prime is 265894864637. The next prime is 265894864771. The reversal of 265894864705 is 507468498562.

265894864705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 44288360704 + 221606504001 = 210448^2 + 470751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 265894864705 - 2¹⁹ = 265894340417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988254 + ... + 1228183.

It is an arithmetic number, because the mean of its divisors is an integer number (39885910029).

Almost surely, 2^265894864705 is an apocalyptic number.

It is an amenable number.

265894864705 is a deficient number, since it is larger than the sum of its proper divisors (53192415527).

265894864705 is a wasteful number, since it uses less digits than its factorization.

265894864705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240435.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 265894864705 in words is "two hundred sixty-five billion, eight hundred ninety-four million, eight hundred sixty-four thousand, seven hundred five".