216220543670455 has 4 divisors (see below), whose sum is σ = 259464652404552. Its totient is φ = 172976434936360.

The previous prime is 216220543670393. The next prime is 216220543670533. The reversal of 216220543670455 is 554076345022612.

216220543670455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216220543670455 - 2²⁹ = 216220006799543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21622054367041 + ... + 21622054367050.

It is an arithmetic number, because the mean of its divisors is an integer number (64866163101138).

Almost surely, 2^{216220543670455} is an apocalyptic number.

216220543670455 is a deficient number, since it is larger than the sum of its proper divisors (43244108734097).

216220543670455 is an equidigital number, since it uses as much as digits as its factorization.

216220543670455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43244108734096.

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 216220543670455 in words is "two hundred sixteen trillion, two hundred twenty billion, five hundred forty-three million, six hundred seventy thousand, four hundred fifty-five".