16281642816684 has 144 divisors (see below), whose sum is σ = 48665891776320. Its totient is φ = 4490739187200.

The previous prime is 16281642816661. The next prime is 16281642816701. The reversal of 16281642816684 is 48661824618261.

It is a happy number.

16281642816684 is a `hidden beast` number, since 1 + 62 + 8 + 16 + 428 + 1 + 66 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44403522 + ... + 44768694.

It is an arithmetic number, because the mean of its divisors is an integer number (337957581780).

Almost surely, 2^{16281642816684} is an apocalyptic number.

16281642816684 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 16281642816684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24332945888160).

16281642816684 is an abundant number, since it is smaller than the sum of its proper divisors (32384248959636).

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

16281642816684 is a wasteful number, since it uses less digits than its factorization.

16281642816684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371320 (or 371315 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 63.

The spelling of 16281642816684 in words is "sixteen trillion, two hundred eighty-one billion, six hundred forty-two million, eight hundred sixteen thousand, six hundred eighty-four".