16231988616 has 64 divisors (see below), whose sum is σ = 42087936000. Its totient is φ = 5211259200.

The previous prime is 16231988611. The next prime is 16231988623. The reversal of 16231988616 is 61688913261.

It is not an unprimeable number, because it can be changed into a prime (16231988611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105285 + ... + 208683.

It is an arithmetic number, because the mean of its divisors is an integer number (657624000).

Almost surely, 2^16231988616 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 16231988616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21043968000).

16231988616 is an abundant number, since it is smaller than the sum of its proper divisors (25855947384).

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

16231988616 is a wasteful number, since it uses less digits than its factorization.

16231988616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103650 (or 103646 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The spelling of 16231988616 in words is "sixteen billion, two hundred thirty-one million, nine hundred eighty-eight thousand, six hundred sixteen".