216415236406 has 16 divisors (see below), whose sum is σ = 331547779584. Its totient is φ = 105899560744.

The previous prime is 216415236377. The next prime is 216415236487. The reversal of 216415236406 is 604632514612.

216415236406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 2048721 + ... + 2151763.

It is an arithmetic number, because the mean of its divisors is an integer number (20721736224).

Almost surely, 2^216415236406 is an apocalyptic number.

216415236406 is a deficient number, since it is larger than the sum of its proper divisors (115132543178).

216415236406 is a wasteful number, since it uses less digits than its factorization.

216415236406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125435.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 216415236406 in words is "two hundred sixteen billion, four hundred fifteen million, two hundred thirty-six thousand, four hundred six".