565439329849 has 3 divisors (see below), whose sum is σ = 565440081807. Its totient is φ = 565438577892.

The previous prime is 565439329817. The next prime is 565439329859. The reversal of 565439329849 is 948923934565.

The square root of 565439329849 is 751957.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 199089978025 + 366349351824 = 446195^2 + 605268^2 .

It is not a de Polignac number, because 565439329849 - 2⁵ = 565439329817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565439329859) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 375979 + ... + 1127935.

It is an arithmetic number, because the mean of its divisors is an integer number (188480027269).

Almost surely, 2^565439329849 is an apocalyptic number.

565439329849 is the 751957-th square number.

565439329849 is the 375979-th centered octagonal number.

It is an amenable number.

565439329849 is a deficient number, since it is larger than the sum of its proper divisors (751958).

565439329849 is an frugal number, since it uses more digits than its factorization.

565439329849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503914 (or 751957 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 67.

The spelling of 565439329849 in words is "five hundred sixty-five billion, four hundred thirty-nine million, three hundred twenty-nine thousand, eight hundred forty-nine".