2688421011 has 4 divisors (see below), whose sum is σ = 3584561352. Its totient is φ = 1792280672.

The previous prime is 2688420991. The next prime is 2688421013. The reversal of 2688421011 is 1101248862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2688421011 - 2¹³ = 2688412819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2688421013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448070166 + ... + 448070171.

It is an arithmetic number, because the mean of its divisors is an integer number (896140338).

Almost surely, 2^2688421011 is an apocalyptic number.

2688421011 is a deficient number, since it is larger than the sum of its proper divisors (896140341).

2688421011 is an equidigital number, since it uses as much as digits as its factorization.

2688421011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896140340.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 2688421011 is about 51849.9856412709. The cubic root of 2688421011 is about 1390.4832457054.

Adding to 2688421011 its reverse (1101248862), we get a palindrome (3789669873).

It can be divided in two parts, 26884 and 21011, that added together give a triangular number (47895 = T₃₀₉).

The spelling of 2688421011 in words is "two billion, six hundred eighty-eight million, four hundred twenty-one thousand, eleven".