216421607191045 has 16 divisors (see below), whose sum is σ = 267255276301440. Its totient is φ = 168122993217984.

The previous prime is 216421607190959. The next prime is 216421607191063. The reversal of 216421607191045 is 540191706124612.

It is a cyclic number.

It is not a de Polignac number, because 216421607191045 - 2⁹ = 216421607190533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216421607191045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162776255 + ... + 1162962364.

It is an arithmetic number, because the mean of its divisors is an integer number (16703454768840).

Almost surely, 2^{216421607191045} is an apocalyptic number.

It is an amenable number.

216421607191045 is a deficient number, since it is larger than the sum of its proper divisors (50833669110395).

216421607191045 is a wasteful number, since it uses less digits than its factorization.

216421607191045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325739164.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 216421607191045 in words is "two hundred sixteen trillion, four hundred twenty-one billion, six hundred seven million, one hundred ninety-one thousand, forty-five".