216600155505550 has 24 divisors (see below), whose sum is σ = 405347922931896. Its totient is φ = 86108528075040.

The previous prime is 216600155505533. The next prime is 216600155505577. The reversal of 216600155505550 is 55505551006612.

It is a self number, because there is not a number n which added to its sum of digits gives 216600155505550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13288344949 + ... + 13288361248.

It is an arithmetic number, because the mean of its divisors is an integer number (16889496788829).

Almost surely, 2^{216600155505550} is an apocalyptic number.

216600155505550 is a deficient number, since it is larger than the sum of its proper divisors (188747767426346).

216600155505550 is a wasteful number, since it uses less digits than its factorization.

216600155505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26576706372 (or 26576706367 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 46.

The spelling of 216600155505550 in words is "two hundred sixteen trillion, six hundred billion, one hundred fifty-five million, five hundred five thousand, five hundred fifty".