16205665896 has 384 divisors, whose sum is σ = 56052864000. Its totient is φ = 4237764480.

The previous prime is 16205665873. The next prime is 16205665897. The reversal of 16205665896 is 69856650261.

16205665896 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 56 + 6 + 589 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16205665897) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27607315 + ... + 27607901.

It is an arithmetic number, because the mean of its divisors is an integer number (145971000).

Almost surely, 2^16205665896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16205665896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28026432000).

16205665896 is an abundant number, since it is smaller than the sum of its proper divisors (39847198104).

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

16205665896 is a wasteful number, since it uses less digits than its factorization.

16205665896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 16205665896 in words is "sixteen billion, two hundred five million, six hundred sixty-five thousand, eight hundred ninety-six".