18383646005455 has 16 divisors (see below), whose sum is σ = 22067829411264. Its totient is φ = 14701948208640.

The previous prime is 18383646005401. The next prime is 18383646005471. The reversal of 18383646005455 is 55450064638381.

It is a happy number.

It is not a de Polignac number, because 18383646005455 - 2¹³ = 18383645997263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18383646005455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189820174 + ... + 189916996.

It is an arithmetic number, because the mean of its divisors is an integer number (1379239338204).

Almost surely, 2^{18383646005455} is an apocalyptic number.

18383646005455 is a deficient number, since it is larger than the sum of its proper divisors (3684183405809).

18383646005455 is an equidigital number, since it uses as much as digits as its factorization.

18383646005455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109266.

The product of its (nonzero) digits is 41472000, while the sum is 58.

The spelling of 18383646005455 in words is "eighteen trillion, three hundred eighty-three billion, six hundred forty-six million, five thousand, four hundred fifty-five".