1679511685 has 16 divisors (see below), whose sum is σ = 2135943216. Its totient is φ = 1263403008.

The previous prime is 1679511683. The next prime is 1679511689. The reversal of 1679511685 is 5861159761.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 25381444 + 1654130241 = 5038^2 + 40671^2 .

It is not a de Polignac number, because 1679511685 - 2¹ = 1679511683 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 (1679511683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89437 + ... + 106573.

It is an arithmetic number, because the mean of its divisors is an integer number (133496451).

Almost surely, 2^1679511685 is an apocalyptic number.

It is an amenable number.

1679511685 is a deficient number, since it is larger than the sum of its proper divisors (456431531).

1679511685 is a wasteful number, since it uses less digits than its factorization.

1679511685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18312.

The product of its digits is 453600, while the sum is 49.

The square root of 1679511685 is about 40981.8457978652. The cubic root of 1679511685 is about 1188.6692005720.

The spelling of 1679511685 in words is "one billion, six hundred seventy-nine million, five hundred eleven thousand, six hundred eighty-five".