265618945085 has 16 divisors (see below), whose sum is σ = 345881733120. Its totient is φ = 194652045120.

The previous prime is 265618945073. The next prime is 265618945087. The reversal of 265618945085 is 580549816562.

It is a de Polignac number, because none of the positive numbers 2^k-265618945085 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265618945087) by changing a digit.

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, 15588605 + ... + 15605634.

It is an arithmetic number, because the mean of its divisors is an integer number (21617608320).

Almost surely, 2^265618945085 is an apocalyptic number.

It is an amenable number.

265618945085 is a deficient number, since it is larger than the sum of its proper divisors (80262788035).

265618945085 is a wasteful number, since it uses less digits than its factorization.

265618945085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194388.

The product of its (nonzero) digits is 20736000, while the sum is 59.

The spelling of 265618945085 in words is "two hundred sixty-five billion, six hundred eighteen million, nine hundred forty-five thousand, eighty-five".