16131655516620 has 192 divisors, whose sum is σ = 52663242433536. Its totient is φ = 3613381263360.

The previous prime is 16131655516609. The next prime is 16131655516649. The reversal of 16131655516620 is 2661555613161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16131655516620.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3945880 + ... + 6916160.

It is an arithmetic number, because the mean of its divisors is an integer number (274287721008).

Almost surely, 2^{16131655516620} is an apocalyptic number.

16131655516620 is a gapful number since it is divisible by the number (10) 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 16131655516620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26331621216768).

16131655516620 is an abundant number, since it is smaller than the sum of its proper divisors (36531586916916).

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

16131655516620 is a wasteful number, since it uses less digits than its factorization.

16131655516620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970560 (or 2970558 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 16131655516620 in words is "sixteen trillion, one hundred thirty-one billion, six hundred fifty-five million, five hundred sixteen thousand, six hundred twenty".