16116661155504 has 320 divisors, whose sum is σ = 51748387891200. Its totient is φ = 4208656859136.

The previous prime is 16116661155499. The next prime is 16116661155527. The reversal of 16116661155504 is 40555116661161.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 742247752 + ... + 742269464.

It is an arithmetic number, because the mean of its divisors is an integer number (161713712160).

Almost surely, 2^{16116661155504} is an apocalyptic number.

16116661155504 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 16116661155504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25874193945600).

16116661155504 is an abundant number, since it is smaller than the sum of its proper divisors (35631726735696).

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

16116661155504 is a wasteful number, since it uses less digits than its factorization.

16116661155504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23412 (or 23406 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 48.

The spelling of 16116661155504 in words is "sixteen trillion, one hundred sixteen billion, six hundred sixty-one million, one hundred fifty-five thousand, five hundred four".