21616231105435 has 8 divisors (see below), whose sum is σ = 26206894619136. Its totient is φ = 17114706689280.

The previous prime is 21616231105421. The next prime is 21616231105439. The reversal of 21616231105435 is 53450113261612.

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

It is not a de Polignac number, because 21616231105435 - 2¹⁷ = 21616230974363 is a prime.

It is a super-2 number, since 2×21616231105435² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21616231105439) 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, 22284773851 + ... + 22284774820.

It is an arithmetic number, because the mean of its divisors is an integer number (3275861827392).

Almost surely, 2^{21616231105435} is an apocalyptic number.

21616231105435 is a deficient number, since it is larger than the sum of its proper divisors (4590663513701).

21616231105435 is an equidigital number, since it uses as much as digits as its factorization.

21616231105435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44569548773.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 21616231105435 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-one million, one hundred five thousand, four hundred thirty-five".