685111633 has 4 divisors (see below), whose sum is σ = 721170160. Its totient is φ = 649053108.

The previous prime is 685111619. The next prime is 685111673. The reversal of 685111633 is 336111586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685111633 - 2⁵ = 685111601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685111673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18029235 + ... + 18029272.

It is an arithmetic number, because the mean of its divisors is an integer number (180292540).

Almost surely, 2^685111633 is an apocalyptic number.

It is an amenable number.

685111633 is a deficient number, since it is larger than the sum of its proper divisors (36058527).

685111633 is a wasteful number, since it uses less digits than its factorization.

685111633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36058526.

The product of its digits is 12960, while the sum is 34.

The square root of 685111633 is about 26174.6372085651. The cubic root of 685111633 is about 881.5638656128.

The spelling of 685111633 in words is "six hundred eighty-five million, one hundred eleven thousand, six hundred thirty-three".