545905865 has 16 divisors (see below), whose sum is σ = 666610560. Its totient is φ = 429085440.

The previous prime is 545905861. The next prime is 545905903. The reversal of 545905865 is 568509545.

It is not a de Polignac number, because 545905865 - 2² = 545905861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545905861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106481 + ... + 111489.

It is an arithmetic number, because the mean of its divisors is an integer number (41663160).

Almost surely, 2^545905865 is an apocalyptic number.

It is an amenable number.

545905865 is a deficient number, since it is larger than the sum of its proper divisors (120704695).

545905865 is a wasteful number, since it uses less digits than its factorization.

545905865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The square root of 545905865 is about 23364.6285012195. The cubic root of 545905865 is about 817.2832283190.

The spelling of 545905865 in words is "five hundred forty-five million, nine hundred five thousand, eight hundred sixty-five".