18084286481551 has 4 divisors (see below), whose sum is σ = 18088886914504. Its totient is φ = 18079686048600.

The previous prime is 18084286481549. The next prime is 18084286481557. The reversal of 18084286481551 is 15518468248081.

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 18084286481551 - 2¹ = 18084286481549 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 18084286481551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18084286481557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300210580 + ... + 2300218441.

It is an arithmetic number, because the mean of its divisors is an integer number (4522221728626).

Almost surely, 2^{18084286481551} is an apocalyptic number.

18084286481551 is a deficient number, since it is larger than the sum of its proper divisors (4600432953).

18084286481551 is an equidigital number, since it uses as much as digits as its factorization.

18084286481551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600432952.

The product of its (nonzero) digits is 19660800, while the sum is 61.

The spelling of 18084286481551 in words is "eighteen trillion, eighty-four billion, two hundred eighty-six million, four hundred eighty-one thousand, five hundred fifty-one".