21155164355335 has 8 divisors (see below), whose sum is σ = 25623451406736. Its totient is φ = 16765962030720.

The previous prime is 21155164355323. The next prime is 21155164355359. The reversal of 21155164355335 is 53355346155112.

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

It is not a de Polignac number, because 21155164355335 - 2⁷ = 21155164355207 is a prime.

It is a super-2 number, since 2×21155164355335² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19771181106 + ... + 19771182175.

It is an arithmetic number, because the mean of its divisors is an integer number (3202931425842).

Almost surely, 2^{21155164355335} is an apocalyptic number.

21155164355335 is a deficient number, since it is larger than the sum of its proper divisors (4468287051401).

21155164355335 is a wasteful number, since it uses less digits than its factorization.

21155164355335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39542363393.

The product of its digits is 4050000, while the sum is 49.

The spelling of 21155164355335 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred sixty-four million, three hundred fifty-five thousand, three hundred thirty-five".