2688687643 has 16 divisors (see below), whose sum is σ = 2846844000. Its totient is φ = 2535466752.

The previous prime is 2688687637. The next prime is 2688687647. The reversal of 2688687643 is 3467868862.

It is not a de Polignac number, because 2688687643 - 2⁵ = 2688687611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688687647) 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, 263623 + ... + 273631.

It is an arithmetic number, because the mean of its divisors is an integer number (177927750).

Almost surely, 2^2688687643 is an apocalyptic number.

2688687643 is a deficient number, since it is larger than the sum of its proper divisors (158156357).

2688687643 is a wasteful number, since it uses less digits than its factorization.

2688687643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254.

The product of its digits is 18579456, while the sum is 58.

The square root of 2688687643 is about 51852.5567643487. The cubic root of 2688687643 is about 1390.5292125971.

The spelling of 2688687643 in words is "two billion, six hundred eighty-eight million, six hundred eighty-seven thousand, six hundred forty-three".