684866959668485 has 96 divisors (see below), whose sum is σ = 972830758325760. Its totient is φ = 458730038476800.

The previous prime is 684866959668461. The next prime is 684866959668487. The reversal of 684866959668485 is 584866959668486.

It is a happy number.

It is not a de Polignac number, because 684866959668485 - 2¹⁰ = 684866959667461 is a prime.

It is a super-2 number, since 2×684866959668485² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 684866959668391 and 684866959668400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684866959668487) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4348586621 + ... + 4348744109.

It is an arithmetic number, because the mean of its divisors is an integer number (10133653732560).

Almost surely, 2^{684866959668485} is an apocalyptic number.

It is an amenable number.

684866959668485 is a deficient number, since it is larger than the sum of its proper divisors (287963798657275).

684866959668485 is a wasteful number, since it uses less digits than its factorization.

684866959668485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163407 (or 163390 counting only the distinct ones).

The product of its digits is 1031956070400, while the sum is 98.

Subtracting from 684866959668485 its reverse (584866959668486), we obtain a palindrome (99999999999999).

The spelling of 684866959668485 in words is "six hundred eighty-four trillion, eight hundred sixty-six billion, nine hundred fifty-nine million, six hundred sixty-eight thousand, four hundred eighty-five".