685111820802 has 16 divisors (see below), whose sum is σ = 1370255479680. Its totient is φ = 228365300592.

The previous prime is 685111820801. The next prime is 685111820839. The reversal of 685111820802 is 208028111586.

It is a super-3 number, since 3×685111820802³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (685111820801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042153 + ... + 1567260.

It is an arithmetic number, because the mean of its divisors is an integer number (85640967480).

Almost surely, 2^685111820802 is an apocalyptic number.

685111820802 is an abundant number, since it is smaller than the sum of its proper divisors (685143658878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685111820802 is a wasteful number, since it uses less digits than its factorization.

685111820802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653177.

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 685111820802 in words is "six hundred eighty-five billion, one hundred eleven million, eight hundred twenty thousand, eight hundred two".