684910852885 has 16 divisors (see below), whose sum is σ = 941173744896. Its totient is φ = 468719440128.

The previous prime is 684910852853. The next prime is 684910852891. The reversal of 684910852885 is 588258019486.

It is a cyclic number.

It is not a de Polignac number, because 684910852885 - 2⁵ = 684910852853 is a prime.

It is a super-2 number, since 2×684910852885² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19434564 + ... + 19469773.

It is an arithmetic number, because the mean of its divisors is an integer number (58823359056).

Almost surely, 2^684910852885 is an apocalyptic number.

It is an amenable number.

684910852885 is a deficient number, since it is larger than the sum of its proper divisors (256262892011).

684910852885 is a wasteful number, since it uses less digits than its factorization.

684910852885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38904852.

The product of its (nonzero) digits is 44236800, while the sum is 64.

The spelling of 684910852885 in words is "six hundred eighty-four billion, nine hundred ten million, eight hundred fifty-two thousand, eight hundred eighty-five".