19697216327165 has 16 divisors (see below), whose sum is σ = 25456062769200. Its totient is φ = 14544951762432.

The previous prime is 19697216327149. The next prime is 19697216327177. The reversal of 19697216327165 is 56172361279691.

It can be written as a sum of positive squares in 8 ways, for example, as 3598681086361 + 16098535240804 = 1897019^2 + 4012298^2 .

It is not a de Polignac number, because 19697216327165 - 2⁴ = 19697216327149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5741360 + ... + 8506329.

It is an arithmetic number, because the mean of its divisors is an integer number (1591003923075).

Almost surely, 2^{19697216327165} is an apocalyptic number.

It is an amenable number.

19697216327165 is a deficient number, since it is larger than the sum of its proper divisors (5758846442035).

19697216327165 is a wasteful number, since it uses less digits than its factorization.

19697216327165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14268976.

The product of its digits is 51438240, while the sum is 65.

The spelling of 19697216327165 in words is "nineteen trillion, six hundred ninety-seven billion, two hundred sixteen million, three hundred twenty-seven thousand, one hundred sixty-five".