2685671521 has 16 divisors (see below), whose sum is σ = 3029322240. Its totient is φ = 2362409280.

The previous prime is 2685671497. The next prime is 2685671539. The reversal of 2685671521 is 1251765862.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2685671521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2685671591) 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, 63736 + ... + 97126.

It is an arithmetic number, because the mean of its divisors is an integer number (189332640).

Almost surely, 2^2685671521 is an apocalyptic number.

It is an amenable number.

2685671521 is a deficient number, since it is larger than the sum of its proper divisors (343650719).

2685671521 is a wasteful number, since it uses less digits than its factorization.

2685671521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33696.

The product of its digits is 201600, while the sum is 43.

The square root of 2685671521 is about 51823.4649652066. The cubic root of 2685671521 is about 1390.0090610661.

The spelling of 2685671521 in words is "two billion, six hundred eighty-five million, six hundred seventy-one thousand, five hundred twenty-one".