2686643489 has 8 divisors (see below), whose sum is σ = 2778973440. Its totient is φ = 2594667600.

The previous prime is 2686643437. The next prime is 2686643497. The reversal of 2686643489 is 9843466862.

It is a happy number.

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 2686643489 - 2¹⁶ = 2686577953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2686643429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73034 + ... + 103475.

It is an arithmetic number, because the mean of its divisors is an integer number (347371680).

Almost surely, 2^2686643489 is an apocalyptic number.

It is an amenable number.

2686643489 is a deficient number, since it is larger than the sum of its proper divisors (92329951).

2686643489 is a wasteful number, since it uses less digits than its factorization.

2686643489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177031.

The product of its digits is 11943936, while the sum is 56.

The square root of 2686643489 is about 51832.8417993843. The cubic root of 2686643489 is about 1390.1767263179.

The spelling of 2686643489 in words is "two billion, six hundred eighty-six million, six hundred forty-three thousand, four hundred eighty-nine".