2689343645 has 8 divisors (see below), whose sum is σ = 3417048504. Its totient is φ = 2024917504.

The previous prime is 2689343641. The next prime is 2689343659. The reversal of 2689343645 is 5463439862.

It can be written as a sum of positive squares in 4 ways, for example, as 254019844 + 2435323801 = 15938^2 + 49349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2689343645 - 2² = 2689343641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2689343593 and 2689343602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689343641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15819584 + ... + 15819753.

It is an arithmetic number, because the mean of its divisors is an integer number (427131063).

Almost surely, 2^2689343645 is an apocalyptic number.

It is an amenable number.

2689343645 is a deficient number, since it is larger than the sum of its proper divisors (727704859).

2689343645 is a wasteful number, since it uses less digits than its factorization.

2689343645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31639359.

The product of its digits is 3732480, while the sum is 50.

The square root of 2689343645 is about 51858.8820261293. The cubic root of 2689343645 is about 1390.6422932630.

The spelling of 2689343645 in words is "two billion, six hundred eighty-nine million, three hundred forty-three thousand, six hundred forty-five".