16216218513840 has 80 divisors (see below), whose sum is σ = 50270739618528. Its totient is φ = 4324285175808.

The previous prime is 16216218513829. The next prime is 16216218513863. The reversal of 16216218513840 is 4831581261261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16216218513840.

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, 33493324 + ... + 33974036.

Almost surely, 2^{16216218513840} is an apocalyptic number.

16216218513840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16216218513840 is an abundant number, since it is smaller than the sum of its proper divisors (34054521104688).

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

16216218513840 is a wasteful number, since it uses less digits than its factorization.

16216218513840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621286 (or 621280 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 16216218513840 in words is "sixteen trillion, two hundred sixteen billion, two hundred eighteen million, five hundred thirteen thousand, eight hundred forty".