21622165110655 has 16 divisors (see below), whose sum is σ = 26643823747200. Its totient is φ = 16835757932448.

The previous prime is 21622165110653. The next prime is 21622165110671. The reversal of 21622165110655 is 55601156122612.

It is a cyclic number.

It is not a de Polignac number, because 21622165110655 - 2¹ = 21622165110653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622165110653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177621505 + ... + 177743194.

It is an arithmetic number, because the mean of its divisors is an integer number (1665238984200).

Almost surely, 2^{21622165110655} is an apocalyptic number.

21622165110655 is a deficient number, since it is larger than the sum of its proper divisors (5021658636545).

21622165110655 is a wasteful number, since it uses less digits than its factorization.

21622165110655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355365030.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 21622165110655 in words is "twenty-one trillion, six hundred twenty-two billion, one hundred sixty-five million, one hundred ten thousand, six hundred fifty-five".