216532445566104 has 128 divisors (see below), whose sum is σ = 629848055923200. Its totient is φ = 68795374792320.

The previous prime is 216532445566093. The next prime is 216532445566141. The reversal of 216532445566104 is 401665544235612.

216532445566104 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 3 + 24 + 4 + 556 + 61 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75600127 + ... + 78412014.

It is an arithmetic number, because the mean of its divisors is an integer number (4920687936900).

Almost surely, 2^{216532445566104} is an apocalyptic number.

216532445566104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216532445566104 is an abundant number, since it is smaller than the sum of its proper divisors (413315610357096).

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

216532445566104 is a wasteful number, since it uses less digits than its factorization.

216532445566104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154012462 (or 154012452 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 216532445566104 in words is "two hundred sixteen trillion, five hundred thirty-two billion, four hundred forty-five million, five hundred sixty-six thousand, one hundred four".