685650241600 has 189 divisors, whose sum is σ = 1711013825997. Its totient is φ = 270431239680.

The previous prime is 685650241531. The next prime is 685650241609. The reversal of 685650241600 is 6142056586.

The square root of 685650241600 is 828040.

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., 246834086976 + 438816154624 = 496824^2 + 662432^2 .

It is a super-2 number, since 2×685650241600² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685650241609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4206443119 + ... + 4206443281.

Almost surely, 2^685650241600 is an apocalyptic number.

685650241600 is the 828040-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685650241600

685650241600 is an abundant number, since it is smaller than the sum of its proper divisors (1025363584397).

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

685650241600 is an equidigital number, since it uses as much as digits as its factorization.

685650241600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 685650241600 in words is "six hundred eighty-five billion, six hundred fifty million, two hundred forty-one thousand, six hundred".