265194988385 has 16 divisors (see below), whose sum is σ = 323618500800. Its totient is φ = 208578760896.

The previous prime is 265194988363. The next prime is 265194988393. The reversal of 265194988385 is 583889491562.

It is a cyclic number.

It is not a de Polignac number, because 265194988385 - 2¹² = 265194984289 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607115 + ... + 948144.

It is an arithmetic number, because the mean of its divisors is an integer number (20226156300).

Almost surely, 2^265194988385 is an apocalyptic number.

It is an amenable number.

265194988385 is a deficient number, since it is larger than the sum of its proper divisors (58423512415).

265194988385 is a wasteful number, since it uses less digits than its factorization.

265194988385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555840.

The product of its digits is 149299200, while the sum is 68.

The spelling of 265194988385 in words is "two hundred sixty-five billion, one hundred ninety-four million, nine hundred eighty-eight thousand, three hundred eighty-five".