685064517002 has 8 divisors (see below), whose sum is σ = 1029123667236. Its totient is φ = 342023294592.

The previous prime is 685064517001. The next prime is 685064517031. The reversal of 685064517002 is 200715460586.

It can be written as a sum of positive squares in 2 ways, for example, as 627484195321 + 57580321681 = 792139^2 + 239959^2 .

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

It is not an unprimeable number, because it can be changed into a prime (685064517001) 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 3 ways as a sum of consecutive naturals, for example, 254480273 + ... + 254482964.

Almost surely, 2^685064517002 is an apocalyptic number.

685064517002 is a deficient number, since it is larger than the sum of its proper divisors (344059150234).

685064517002 is a wasteful number, since it uses less digits than its factorization.

685064517002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508963912.

The product of its (nonzero) digits is 403200, while the sum is 44.

Adding to 685064517002 its reverse (200715460586), we get a palindrome (885779977588).

The spelling of 685064517002 in words is "six hundred eighty-five billion, sixty-four million, five hundred seventeen thousand, two".