216065370987 has 24 divisors (see below), whose sum is σ = 324621293568. Its totient is φ = 138332890800.

The previous prime is 216065370971. The next prime is 216065371057. The reversal of 216065370987 is 789073560612.

216065370987 is a `hidden beast` number, since 2 + 16 + 0 + 6 + 537 + 0 + 98 + 7 = 666.

It is not a de Polignac number, because 216065370987 - 2⁴ = 216065370971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216065370907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2919283 + ... + 2992380.

It is an arithmetic number, because the mean of its divisors is an integer number (13525887232).

Almost surely, 2^216065370987 is an apocalyptic number.

216065370987 is a deficient number, since it is larger than the sum of its proper divisors (108555922581).

216065370987 is a wasteful number, since it uses less digits than its factorization.

216065370987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911831 (or 5911828 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 216065370987 in words is "two hundred sixteen billion, sixty-five million, three hundred seventy thousand, nine hundred eighty-seven".