21968264988255 has 8 divisors (see below), whose sum is σ = 35149223981232. Its totient is φ = 11716407993728.

The previous prime is 21968264988247. The next prime is 21968264988259. The reversal of 21968264988255 is 55288946286912.

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 21968264988255 - 2³ = 21968264988247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21968264988259) 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, 732275499594 + ... + 732275499623.

It is an arithmetic number, because the mean of its divisors is an integer number (4393652997654).

Almost surely, 2^{21968264988255} is an apocalyptic number.

21968264988255 is a deficient number, since it is larger than the sum of its proper divisors (13180958992977).

21968264988255 is a wasteful number, since it uses less digits than its factorization.

21968264988255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464550999225.

The product of its digits is 1194393600, while the sum is 75.

The spelling of 21968264988255 in words is "twenty-one trillion, nine hundred sixty-eight billion, two hundred sixty-four million, nine hundred eighty-eight thousand, two hundred fifty-five".