216181830848525 has 12 divisors (see below), whose sum is σ = 268104932478132. Its totient is φ = 172920005178240.

The previous prime is 216181830848513. The next prime is 216181830848551. The reversal of 216181830848525 is 525848038181612.

It can be written as a sum of positive squares in 6 ways, for example, as 959610282409 + 215222220566116 = 979597^2 + 14670454^2 .

It is not a de Polignac number, because 216181830848525 - 2³⁰ = 216180757106701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 636314294 + ... + 636653943.

It is an arithmetic number, because the mean of its divisors is an integer number (22342077706511).

Almost surely, 2^{216181830848525} is an apocalyptic number.

216181830848525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216181830848525 is a deficient number, since it is larger than the sum of its proper divisors (51923101629607).

216181830848525 is a wasteful number, since it uses less digits than its factorization.

216181830848525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272975040 (or 1272975035 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 62.

The spelling of 216181830848525 in words is "two hundred sixteen trillion, one hundred eighty-one billion, eight hundred thirty million, eight hundred forty-eight thousand, five hundred twenty-five".