685741801 has 16 divisors (see below), whose sum is σ = 753872400. Its totient is φ = 623019264.

The previous prime is 685741739. The next prime is 685741807. The reversal of 685741801 is 108147586.

It can be written as a sum of positive squares in 8 ways, for example, as 25200400 + 660541401 = 5020^2 + 25701^2 .

It is not a de Polignac number, because 685741801 - 2⁹ = 685741289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685741807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140071 + ... + 144883.

It is an arithmetic number, because the mean of its divisors is an integer number (47117025).

Almost surely, 2^685741801 is an apocalyptic number.

It is an amenable number.

685741801 is a deficient number, since it is larger than the sum of its proper divisors (68130599).

685741801 is an equidigital number, since it uses as much as digits as its factorization.

685741801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893 (or 4859 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 685741801 is about 26186.6722017136. The cubic root of 685741801 is about 881.8340712606.

The spelling of 685741801 in words is "six hundred eighty-five million, seven hundred forty-one thousand, eight hundred one".