16155561110001 has 8 divisors (see below), whose sum is σ = 21540777848160. Its totient is φ = 10770359222592.

The previous prime is 16155561109993. The next prime is 16155561110047. The reversal of 16155561110001 is 10001116555161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16155561110001 - 2³ = 16155561109993 is a prime.

It is a super-2 number, since 2×16155561110001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16155561510001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 861555 + ... + 5749208.

It is an arithmetic number, because the mean of its divisors is an integer number (2692597231020).

Almost surely, 2^{16155561110001} is an apocalyptic number.

It is an amenable number.

16155561110001 is a deficient number, since it is larger than the sum of its proper divisors (5385216738159).

16155561110001 is an equidigital number, since it uses as much as digits as its factorization.

16155561110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7425375.

The product of its (nonzero) digits is 4500, while the sum is 33.

Adding to 16155561110001 its reverse (10001116555161), we get a palindrome (26156677665162).

The spelling of 16155561110001 in words is "sixteen trillion, one hundred fifty-five billion, five hundred sixty-one million, one hundred ten thousand, one".