16111616501 has 4 divisors (see below), whose sum is σ = 16254197292. Its totient is φ = 15969035712.

The previous prime is 16111616489. The next prime is 16111616557. The reversal of 16111616501 is 10561611161.

It is a happy number.

16111616501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5512914001 + 10598702500 = 74249^2 + 102950^2 .

It is a cyclic number.

It is not a de Polignac number, because 16111616501 - 2¹⁰ = 16111615477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16111616201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71290226 + ... + 71290451.

It is an arithmetic number, because the mean of its divisors is an integer number (4063549323).

Almost surely, 2^16111616501 is an apocalyptic number.

It is an amenable number.

16111616501 is a deficient number, since it is larger than the sum of its proper divisors (142580791).

16111616501 is a wasteful number, since it uses less digits than its factorization.

16111616501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142580790.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 16111616501 in words is "sixteen billion, one hundred eleven million, six hundred sixteen thousand, five hundred one".