216111561156065 has 64 divisors (see below), whose sum is σ = 272497391308800. Its totient is φ = 164309035027200.

The previous prime is 216111561155953. The next prime is 216111561156067. The reversal of 216111561156065 is 560651165111612.

It is not a de Polignac number, because 216111561156065 - 2²² = 216111556961761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216111561156067) by changing a digit.

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 in 63 ways as a sum of consecutive naturals, for example, 19541685506 + ... + 19541696564.

It is an arithmetic number, because the mean of its divisors is an integer number (4257771739200).

Almost surely, 2^{216111561156065} is an apocalyptic number.

It is an amenable number.

216111561156065 is a deficient number, since it is larger than the sum of its proper divisors (56385830152735).

216111561156065 is a wasteful number, since it uses less digits than its factorization.

216111561156065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14078.

The product of its (nonzero) digits is 324000, while the sum is 47.

The spelling of 216111561156065 in words is "two hundred sixteen trillion, one hundred eleven billion, five hundred sixty-one million, one hundred fifty-six thousand, sixty-five".