679395589165 has 4 divisors (see below), whose sum is σ = 815274707004. Its totient is φ = 543516471328.

The previous prime is 679395589163. The next prime is 679395589177. The reversal of 679395589165 is 561985593976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 220912220169 + 458483368996 = 470013^2 + 677114^2 .

It is a cyclic number.

It is not a de Polignac number, because 679395589165 - 2¹ = 679395589163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679395589163) 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, 67939558912 + ... + 67939558921.

It is an arithmetic number, because the mean of its divisors is an integer number (203818676751).

Almost surely, 2^679395589165 is an apocalyptic number.

It is an amenable number.

679395589165 is a deficient number, since it is larger than the sum of its proper divisors (135879117839).

679395589165 is a wasteful number, since it uses less digits than its factorization.

679395589165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135879117838.

The product of its digits is 551124000, while the sum is 73.

The spelling of 679395589165 in words is "six hundred seventy-nine billion, three hundred ninety-five million, five hundred eighty-nine thousand, one hundred sixty-five".