216686892369124 has 6 divisors (see below), whose sum is σ = 379202061645974. Its totient is φ = 108343446184560.

The previous prime is 216686892369083. The next prime is 216686892369137. The reversal of 216686892369124 is 421963298686612.

It can be written as a sum of positive squares in only one way, i.e., 213478924802724 + 3207967566400 = 14610918^2 + 1791080^2 .

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 as a sum of consecutive naturals, namely, 27085861546137 + ... + 27085861546144.

Almost surely, 2^{216686892369124} is an apocalyptic number.

It is an amenable number.

216686892369124 is a deficient number, since it is larger than the sum of its proper divisors (162515169276850).

216686892369124 is a wasteful number, since it uses less digits than its factorization.

216686892369124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54171723092285 (or 54171723092283 counting only the distinct ones).

The product of its digits is 644972544, while the sum is 73.

The spelling of 216686892369124 in words is "two hundred sixteen trillion, six hundred eighty-six billion, eight hundred ninety-two million, three hundred sixty-nine thousand, one hundred twenty-four".