216257669126 has 16 divisors (see below), whose sum is σ = 326652213888. Its totient is φ = 107376225600.

The previous prime is 216257669107. The next prime is 216257669129. The reversal of 216257669126 is 621966752612.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216257669129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491990 + ... + 821321.

It is an arithmetic number, because the mean of its divisors is an integer number (20415763368).

Almost surely, 2^216257669126 is an apocalyptic number.

216257669126 is a deficient number, since it is larger than the sum of its proper divisors (110394544762).

216257669126 is a wasteful number, since it uses less digits than its factorization.

216257669126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313887.

The product of its digits is 3265920, while the sum is 53.

The spelling of 216257669126 in words is "two hundred sixteen billion, two hundred fifty-seven million, six hundred sixty-nine thousand, one hundred twenty-six".