685924017424 has 40 divisors (see below), whose sum is σ = 1344186656280. Its totient is φ = 339052750848.

The previous prime is 685924017419. The next prime is 685924017433. The reversal of 685924017424 is 424710429586.

It can be written as a sum of positive squares in 4 ways, for example, as 4526598400 + 681397419024 = 67280^2 + 825468^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215674 + ... + 1190950.

It is an arithmetic number, because the mean of its divisors is an integer number (33604666407).

Almost surely, 2^685924017424 is an apocalyptic number.

It is an amenable number.

685924017424 is a deficient number, since it is larger than the sum of its proper divisors (658262638856).

685924017424 is a wasteful number, since it uses less digits than its factorization.

685924017424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975787 (or 975781 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 685924017424 in words is "six hundred eighty-five billion, nine hundred twenty-four million, seventeen thousand, four hundred twenty-four".