216552611511 has 20 divisors (see below), whose sum is σ = 340518079000. Its totient is φ = 136770069456.

The previous prime is 216552611501. The next prime is 216552611519. The reversal of 216552611511 is 115116255612.

216552611511 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 526 + 115 + 11 = 666.

It is not a de Polignac number, because 216552611511 - 2⁵ = 216552611479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216552611519) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70353436 + ... + 70356513.

It is an arithmetic number, because the mean of its divisors is an integer number (17025903950).

Almost surely, 2^216552611511 is an apocalyptic number.

216552611511 is a deficient number, since it is larger than the sum of its proper divisors (123965467489).

216552611511 is a wasteful number, since it uses less digits than its factorization.

216552611511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140709980 (or 140709971 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The spelling of 216552611511 in words is "two hundred sixteen billion, five hundred fifty-two million, six hundred eleven thousand, five hundred eleven".