2168553664018 has 16 divisors (see below), whose sum is σ = 3718033997760. Its totient is φ = 929251784016.

The previous prime is 2168553664003. The next prime is 2168553664129. The reversal of 2168553664018 is 8104663558612.

It is a self number, because there is not a number n which added to its sum of digits gives 2168553664018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10591453 + ... + 10794256.

It is an arithmetic number, because the mean of its divisors is an integer number (232377124860).

Almost surely, 2^{2168553664018} is an apocalyptic number.

2168553664018 is a deficient number, since it is larger than the sum of its proper divisors (1549480333742).

2168553664018 is a wasteful number, since it uses less digits than its factorization.

2168553664018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21392961.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 2168553664018 in words is "two trillion, one hundred sixty-eight billion, five hundred fifty-three million, six hundred sixty-four thousand, eighteen".