439709656985 has 8 divisors (see below), whose sum is σ = 545846470920. Its totient is φ = 339637803904.

The previous prime is 439709656961. The next prime is 439709657003. The reversal of 439709656985 is 589656907934.

It can be written as a sum of positive squares in 4 ways, for example, as 149734945936 + 289974711049 = 386956^2 + 538493^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 439709656985 - 2⁶ = 439709656921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1516240052 + ... + 1516240341.

It is an arithmetic number, because the mean of its divisors is an integer number (68230808865).

Almost surely, 2^439709656985 is an apocalyptic number.

It is an amenable number.

439709656985 is a deficient number, since it is larger than the sum of its proper divisors (106136813935).

439709656985 is a wasteful number, since it uses less digits than its factorization.

439709656985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032480427.

The product of its (nonzero) digits is 440899200, while the sum is 71.

The spelling of 439709656985 in words is "four hundred thirty-nine billion, seven hundred nine million, six hundred fifty-six thousand, nine hundred eighty-five".