439242864517 has 16 divisors (see below), whose sum is σ = 461897334000. Its totient is φ = 417090723840.

The previous prime is 439242864509. The next prime is 439242864523. The reversal of 439242864517 is 715468242934.

It is a Cunningham number, because it is equal to 662754²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 58734007201 + 380508857316 = 242351^2 + 616854^2 .

It is a cyclic number.

It is not a de Polignac number, because 439242864517 - 2³ = 439242864509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439242864547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24327109 + ... + 24345157.

It is an arithmetic number, because the mean of its divisors is an integer number (28868583375).

Almost surely, 2^439242864517 is an apocalyptic number.

It is an amenable number.

439242864517 is a deficient number, since it is larger than the sum of its proper divisors (22654469483).

439242864517 is a wasteful number, since it uses less digits than its factorization.

439242864517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31896.

The product of its digits is 11612160, while the sum is 55.

The spelling of 439242864517 in words is "four hundred thirty-nine billion, two hundred forty-two million, eight hundred sixty-four thousand, five hundred seventeen".