18016210464 has 96 divisors (see below), whose sum is σ = 54160598016. Its totient is φ = 5136825600.

The previous prime is 18016210439. The next prime is 18016210501. The reversal of 18016210464 is 46401261081.

It is a tau number, because it is divible by the number of its divisors (96).

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, 299739 + ... + 354789.

It is an arithmetic number, because the mean of its divisors is an integer number (564172896).

Almost surely, 2^18016210464 is an apocalyptic number.

18016210464 is a gapful number since it is divisible by the number (14) 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 18016210464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27080299008).

18016210464 is an abundant number, since it is smaller than the sum of its proper divisors (36144387552).

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

18016210464 is a wasteful number, since it uses less digits than its factorization.

18016210464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55558 (or 55550 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 18016210464 in words is "eighteen billion, sixteen million, two hundred ten thousand, four hundred sixty-four".