216415236405 has 16 divisors (see below), whose sum is σ = 347035579200. Its totient is φ = 115164392448.

The previous prime is 216415236377. The next prime is 216415236487. The reversal of 216415236405 is 504632514612.

216415236405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216415236405 - 2¹⁰ = 216415235381 is a prime.

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, 16059727 + ... + 16073196.

It is an arithmetic number, because the mean of its divisors is an integer number (21689723700).

Almost surely, 2^216415236405 is an apocalyptic number.

It is an amenable number.

216415236405 is a deficient number, since it is larger than the sum of its proper divisors (130620342795).

216415236405 is a wasteful number, since it uses less digits than its factorization.

216415236405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32133380.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 216415236405 in words is "two hundred sixteen billion, four hundred fifteen million, two hundred thirty-six thousand, four hundred five".