19969438028255 has 8 divisors (see below), whose sum is σ = 23963429919312. Its totient is φ = 15975480899008.

The previous prime is 19969438028203. The next prime is 19969438028257. The reversal of 19969438028255 is 55282083496991.

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 19969438028255 - 2⁶ = 19969438028191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19969438028257) 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, 7409462 + ... + 9738531.

It is an arithmetic number, because the mean of its divisors is an integer number (2995428739914).

Almost surely, 2^{19969438028255} is an apocalyptic number.

19969438028255 is a deficient number, since it is larger than the sum of its proper divisors (3993991891057).

19969438028255 is a wasteful number, since it uses less digits than its factorization.

19969438028255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380905.

The product of its (nonzero) digits is 335923200, while the sum is 71.

The spelling of 19969438028255 in words is "nineteen trillion, nine hundred sixty-nine billion, four hundred thirty-eight million, twenty-eight thousand, two hundred fifty-five".