219894673691716 has 27 divisors (see below), whose sum is σ = 385361567165533. Its totient is φ = 109791589476320.

The previous prime is 219894673691683. The next prime is 219894673691717. The reversal of 219894673691716 is 617196376498912.

The square root of 219894673691716 is 14828846.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 577530082116 + 219317143609600 = 759954^2 + 14809360^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219894673691717) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22569498741 + ... + 22569508483.

Almost surely, 2^{219894673691716} is an apocalyptic number.

219894673691716 is the 14828846-th square number.

It is an amenable number.

219894673691716 is a deficient number, since it is larger than the sum of its proper divisors (165466893473817).

219894673691716 is an frugal number, since it uses more digits than its factorization.

219894673691716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012 (or 10506 counting only the distinct ones).

The product of its digits is 1481421312, while the sum is 79.

The spelling of 219894673691716 in words is "two hundred nineteen trillion, eight hundred ninety-four billion, six hundred seventy-three million, six hundred ninety-one thousand, seven hundred sixteen".