16111544544 has 48 divisors (see below), whose sum is σ = 46992007440. Its totient is φ = 5370514560.

The previous prime is 16111544539. The next prime is 16111544609. The reversal of 16111544544 is 44544511161.

16111544544 is a `hidden beast` number, since 1 + 61 + 1 + 1 + 54 + 4 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16111544499 and 16111544508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9322947 + ... + 9324674.

It is an arithmetic number, because the mean of its divisors is an integer number (979000155).

Almost surely, 2^16111544544 is an apocalyptic number.

It is an amenable number.

16111544544 is an abundant number, since it is smaller than the sum of its proper divisors (30880462896).

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

16111544544 is a wasteful number, since it uses less digits than its factorization.

16111544544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18647640 (or 18647626 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The spelling of 16111544544 in words is "sixteen billion, one hundred eleven million, five hundred forty-four thousand, five hundred forty-four".