538856565 has 64 divisors (see below), whose sum is σ = 1001984256. Its totient is φ = 244887552.

The previous prime is 538856561. The next prime is 538856573. The reversal of 538856565 is 565658835.

It is not a de Polignac number, because 538856565 - 2² = 538856561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538856561) 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 63 ways as a sum of consecutive naturals, for example, 174162 + ... + 177228.

It is an arithmetic number, because the mean of its divisors is an integer number (15656004).

Almost surely, 2^538856565 is an apocalyptic number.

It is an amenable number.

538856565 is a deficient number, since it is larger than the sum of its proper divisors (463127691).

538856565 is a wasteful number, since it uses less digits than its factorization.

538856565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158.

The product of its digits is 4320000, while the sum is 51.

The square root of 538856565 is about 23213.2842355406. The cubic root of 538856565 is about 813.7501084235.

The spelling of 538856565 in words is "five hundred thirty-eight million, eight hundred fifty-six thousand, five hundred sixty-five".