684058018084 has 27 divisors (see below), whose sum is σ = 1392570251793. Its totient is φ = 293162759568.

The previous prime is 684058018081. The next prime is 684058018117. The reversal of 684058018084 is 480810850486.

The square root of 684058018084 is 827078.

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., 130414876900 + 553643141184 = 361130^2 + 744072^2 .

It is not an unprimeable number, because it can be changed into a prime (684058018081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11549554 + ... + 11608630.

Almost surely, 2^684058018084 is an apocalyptic number.

684058018084 is the 827078-th square number.

It is an amenable number.

684058018084 is an abundant number, since it is smaller than the sum of its proper divisors (708512233709).

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

684058018084 is an frugal number, since it uses more digits than its factorization.

684058018084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118172 (or 59086 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 52.

The spelling of 684058018084 in words is "six hundred eighty-four billion, fifty-eight million, eighteen thousand, eighty-four".