687223363712 has 72 divisors (see below), whose sum is σ = 1399724716935. Its totient is φ = 336085079296.

The previous prime is 687223363669. The next prime is 687223363721. The reversal of 687223363712 is 217363322786.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 343611681856 + 343611681856 = 586184^2 + 586184^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=586184.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 440809589 + ... + 440811147.

Almost surely, 2^687223363712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687223363712

687223363712 is an abundant number, since it is smaller than the sum of its proper divisors (712501353223).

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

687223363712 is an frugal number, since it uses more digits than its factorization.

687223363712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 1608 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 50.

Multiplying 687223363712 by its sum of digits (50), we get a square (34361168185600 = 5861840²).

The spelling of 687223363712 in words is "six hundred eighty-seven billion, two hundred twenty-three million, three hundred sixty-three thousand, seven hundred twelve".