684925070404 has 81 divisors (see below), whose sum is σ = 1311896934621. Its totient is φ = 312833556000.

The previous prime is 684925070399. The next prime is 684925070413. The reversal of 684925070404 is 404070529486.

The square root of 684925070404 is 827602.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 359158092804 + 325766977600 = 599298^2 + 570760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 912017029 + ... + 912017779.

Almost surely, 2^684925070404 is an apocalyptic number.

684925070404 is the 827602-nd square number.

It is an amenable number.

684925070404 is a deficient number, since it is larger than the sum of its proper divisors (626971864217).

684925070404 is an equidigital number, since it uses as much as digits as its factorization.

684925070404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

Multiplying 684925070404 by its sum of digits (49), we get a square (33561328449796 = 5793214²).

The spelling of 684925070404 in words is "six hundred eighty-four billion, nine hundred twenty-five million, seventy thousand, four hundred four".