2687181018818 has 16 divisors (see below), whose sum is σ = 4187659652280. Its totient is φ = 1291692157056.

The previous prime is 2687181018817. The next prime is 2687181018829. The reversal of 2687181018818 is 8188101817862.

It can be written as a sum of positive squares in 4 ways, for example, as 2602230338449 + 84950680369 = 1613143^2 + 291463^2 .

It is not an unprimeable number, because it can be changed into a prime (2687181018817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99408605 + ... + 99435632.

Almost surely, 2^{2687181018818} is an apocalyptic number.

2687181018818 is a deficient number, since it is larger than the sum of its proper divisors (1500478633462).

2687181018818 is a wasteful number, since it uses less digits than its factorization.

2687181018818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198844501.

The product of its (nonzero) digits is 2752512, while the sum is 59.

The spelling of 2687181018818 in words is "two trillion, six hundred eighty-seven billion, one hundred eighty-one million, eighteen thousand, eight hundred eighteen".