16211655611261 has 8 divisors (see below), whose sum is σ = 18116794741248. Its totient is φ = 14378408524000.

The previous prime is 16211655611227. The next prime is 16211655611311.

It is a happy number.

16211655611261 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 16211655611261 - 2¹⁴ = 16211655594877 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 (16211655611461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17973010205 + ... + 17973011106.

It is an arithmetic number, because the mean of its divisors is an integer number (2264599342656).

Almost surely, 2^{16211655611261} is an apocalyptic number.

16211655611261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16211655611261 is a deficient number, since it is larger than the sum of its proper divisors (1905139129987).

16211655611261 is a wasteful number, since it uses less digits than its factorization.

16211655611261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35946021363.

The product of its digits is 129600, while the sum is 44.

The spelling of 16211655611261 in words is "sixteen trillion, two hundred eleven billion, six hundred fifty-five million, six hundred eleven thousand, two hundred sixty-one".