532509999865 has 8 divisors (see below), whose sum is σ = 639111557448. Its totient is φ = 425941628160.

The previous prime is 532509999839. The next prime is 532509999877. The reversal of 532509999865 is 568999905235.

It can be written as a sum of positive squares in 4 ways, for example, as 160374619024 + 372135380841 = 400468^2 + 610029^2 .

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

It is not a de Polignac number, because 532509999865 - 2¹⁵ = 532509967097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 532509999794 and 532509999803.

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 7 ways as a sum of consecutive naturals, for example, 8261152 + ... + 8325361.

It is an arithmetic number, because the mean of its divisors is an integer number (79888944681).

Almost surely, 2^532509999865 is an apocalyptic number.

It is an amenable number.

532509999865 is a deficient number, since it is larger than the sum of its proper divisors (106601557583).

532509999865 is a wasteful number, since it uses less digits than its factorization.

532509999865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16592939.

The product of its (nonzero) digits is 236196000, while the sum is 70.

The spelling of 532509999865 in words is "five hundred thirty-two billion, five hundred nine million, nine hundred ninety-nine thousand, eight hundred sixty-five".