216611330550 has 24 divisors (see below), whose sum is σ = 537196100136. Its totient is φ = 57763021440.

The previous prime is 216611330543. The next prime is 216611330557. The reversal of 216611330550 is 55033116612.

It is an interprime number because it is at equal distance from previous prime (216611330543) and next prime (216611330557).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216611330557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722037619 + ... + 722037918.

It is an arithmetic number, because the mean of its divisors is an integer number (22383170839).

Almost surely, 2^216611330550 is an apocalyptic number.

216611330550 is an abundant number, since it is smaller than the sum of its proper divisors (320584769586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216611330550 is a wasteful number, since it uses less digits than its factorization.

216611330550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444075552 (or 1444075547 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 216611330550 in words is "two hundred sixteen billion, six hundred eleven million, three hundred thirty thousand, five hundred fifty".