21662053355255 has 16 divisors (see below), whose sum is σ = 26485183954080. Its totient is φ = 17002502444928.

The previous prime is 21662053355221. The next prime is 21662053355287. The reversal of 21662053355255 is 55255335026612.

It is a cyclic number.

It is not a de Polignac number, because 21662053355255 - 2¹⁰ = 21662053354231 is a prime.

It is a super-2 number, since 2×21662053355255² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31681424 + ... + 32357946.

It is an arithmetic number, because the mean of its divisors is an integer number (1655323997130).

Almost surely, 2^{21662053355255} is an apocalyptic number.

21662053355255 is a deficient number, since it is larger than the sum of its proper divisors (4823130598825).

21662053355255 is a wasteful number, since it uses less digits than its factorization.

21662053355255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797410.

The product of its (nonzero) digits is 8100000, while the sum is 50.

The spelling of 21662053355255 in words is "twenty-one trillion, six hundred sixty-two billion, fifty-three million, three hundred fifty-five thousand, two hundred fifty-five".