18147543750016 has 64 divisors (see below), whose sum is σ = 36927114655680. Its totient is φ = 8879609991168.

The previous prime is 18147543749999. The next prime is 18147543750121. The reversal of 18147543750016 is 61005734574181.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 49346530 + ... + 49712926.

It is an arithmetic number, because the mean of its divisors is an integer number (576986166495).

Almost surely, 2^{18147543750016} is an apocalyptic number.

18147543750016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18147543750016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18463557327840).

18147543750016 is an abundant number, since it is smaller than the sum of its proper divisors (18779570905664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18147543750016 is an equidigital number, since it uses as much as digits as its factorization.

18147543750016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374691 (or 374679 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 18147543750016 in words is "eighteen trillion, one hundred forty-seven billion, five hundred forty-three million, seven hundred fifty thousand, sixteen".