685332733731 has 4 divisors (see below), whose sum is σ = 913776978312. Its totient is φ = 456888489152.

The previous prime is 685332733661. The next prime is 685332733733. The reversal of 685332733731 is 137337233586.

685332733731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685332733731 - 2¹⁴ = 685332717347 is a prime.

It is a super-2 number, since 2×685332733731² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685332733733) 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, 114222122286 + ... + 114222122291.

It is an arithmetic number, because the mean of its divisors is an integer number (228444244578).

Almost surely, 2^685332733731 is an apocalyptic number.

685332733731 is a deficient number, since it is larger than the sum of its proper divisors (228444244581).

685332733731 is a wasteful number, since it uses less digits than its factorization.

685332733731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228444244580.

The product of its digits is 5715360, while the sum is 51.

The spelling of 685332733731 in words is "six hundred eighty-five billion, three hundred thirty-two million, seven hundred thirty-three thousand, seven hundred thirty-one".