21655416043341 has 6 divisors (see below), whose sum is σ = 31280045395950. Its totient is φ = 14436944028888.

The previous prime is 21655416043321. The next prime is 21655416043423. The reversal of 21655416043341 is 14334061455612.

21655416043341 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 5 + 4 + 1 + 604 + 3 + 34 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14683043767716 + 6972372275625 = 3831846^2 + 2640525^2 .

It is not a de Polignac number, because 21655416043341 - 2²¹ = 21655413946189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21655416043321) 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 5 ways as a sum of consecutive naturals, for example, 1203078669066 + ... + 1203078669083.

It is an arithmetic number, because the mean of its divisors is an integer number (5213340899325).

Almost surely, 2^{21655416043341} is an apocalyptic number.

It is an amenable number.

21655416043341 is a deficient number, since it is larger than the sum of its proper divisors (9624629352609).

21655416043341 is a wasteful number, since it uses less digits than its factorization.

21655416043341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406157338155 (or 2406157338152 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

Adding to 21655416043341 its reverse (14334061455612), we get a palindrome (35989477498953).

The spelling of 21655416043341 in words is "twenty-one trillion, six hundred fifty-five billion, four hundred sixteen million, forty-three thousand, three hundred forty-one".