685345342145 has 16 divisors (see below), whose sum is σ = 873767414160. Its totient is φ = 515062888704.

The previous prime is 685345342109. The next prime is 685345342163. The reversal of 685345342145 is 541243543586.

It can be written as a sum of positive squares in 8 ways, for example, as 12107041024 + 673238301121 = 110032^2 + 820511^2 .

It is a cyclic number.

It is not a de Polignac number, because 685345342145 - 2⁶ = 685345342081 is a prime.

It is a super-2 number, since 2×685345342145² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685345342093 and 685345342102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63866522 + ... + 63877251.

It is an arithmetic number, because the mean of its divisors is an integer number (54610463385).

Almost surely, 2^685345342145 is an apocalyptic number.

It is an amenable number.

685345342145 is a deficient number, since it is larger than the sum of its proper divisors (188422072015).

685345342145 is a wasteful number, since it uses less digits than its factorization.

685345342145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127743844.

The product of its digits is 6912000, while the sum is 50.

The spelling of 685345342145 in words is "six hundred eighty-five billion, three hundred forty-five million, three hundred forty-two thousand, one hundred forty-five".