685393282418 has 16 divisors (see below), whose sum is σ = 1107888595800. Its totient is φ = 316131123456.

The previous prime is 685393282411. The next prime is 685393282421. The reversal of 685393282418 is 814282393586.

It can be written as a sum of positive squares in 4 ways, for example, as 360603853009 + 324789429409 = 600503^2 + 569903^2 .

It is not an unprimeable number, because it can be changed into a prime (685393282411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8468855 + ... + 8549402.

Almost surely, 2^685393282418 is an apocalyptic number.

685393282418 is a deficient number, since it is larger than the sum of its proper divisors (422495313382).

685393282418 is a wasteful number, since it uses less digits than its factorization.

685393282418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17019821.

The product of its digits is 19906560, while the sum is 59.

The spelling of 685393282418 in words is "six hundred eighty-five billion, three hundred ninety-three million, two hundred eighty-two thousand, four hundred eighteen".