16116116116501 has 4 divisors (see below), whose sum is σ = 16176027329100. Its totient is φ = 16056204903904.

The previous prime is 16116116116489. The next prime is 16116116116523. The reversal of 16116116116501 is 10561161161161.

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 7757951796100 + 8358164320401 = 2785310^2 + 2891049^2 .

It is a cyclic number.

It is not a de Polignac number, because 16116116116501 - 2¹⁷ = 16116115985429 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 (16116116126501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29955605896 + ... + 29955606433.

It is an arithmetic number, because the mean of its divisors is an integer number (4044006832275).

Almost surely, 2^{16116116116501} is an apocalyptic number.

It is an amenable number.

16116116116501 is a deficient number, since it is larger than the sum of its proper divisors (59911212599).

16116116116501 is an equidigital number, since it uses as much as digits as its factorization.

16116116116501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59911212598.

The product of its (nonzero) digits is 6480, while the sum is 37.

Adding to 16116116116501 its reverse (10561161161161), we get a palindrome (26677277277662).

The spelling of 16116116116501 in words is "sixteen trillion, one hundred sixteen billion, one hundred sixteen million, one hundred sixteen thousand, five hundred one".