685701172224 has 264 divisors, whose sum is σ = 2157220796880. Its totient is φ = 215119429632.

The previous prime is 685701172193. The next prime is 685701172229. The reversal of 685701172224 is 422271107586.

685701172224 is a `hidden beast` number, since 6 + 8 + 570 + 1 + 1 + 72 + 2 + 2 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 685701172224.

It is not an unprimeable number, because it can be changed into a prime (685701172229) 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 23 ways as a sum of consecutive naturals, for example, 7947364 + ... + 8033180.

Almost surely, 2^685701172224 is an apocalyptic number.

685701172224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685701172224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1078610398440).

685701172224 is an abundant number, since it is smaller than the sum of its proper divisors (1471519624656).

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

685701172224 is a wasteful number, since it uses less digits than its factorization.

685701172224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85880 (or 85839 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 685701172224 in words is "six hundred eighty-five billion, seven hundred one million, one hundred seventy-two thousand, two hundred twenty-four".