21616041135405 has 8 divisors (see below), whose sum is σ = 34585665816672. Its totient is φ = 11528555272208.

The previous prime is 21616041135391. The next prime is 21616041135407. The reversal of 21616041135405 is 50453114061612.

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 21616041135405 - 2⁹ = 21616041134893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616041135407) 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, 720534704499 + ... + 720534704528.

It is an arithmetic number, because the mean of its divisors is an integer number (4323208227084).

Almost surely, 2^{21616041135405} is an apocalyptic number.

It is an amenable number.

21616041135405 is a deficient number, since it is larger than the sum of its proper divisors (12969624681267).

21616041135405 is a wasteful number, since it uses less digits than its factorization.

21616041135405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441069409035.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21616041135405 in words is "twenty-one trillion, six hundred sixteen billion, forty-one million, one hundred thirty-five thousand, four hundred five".