216409068409456 has 20 divisors (see below), whose sum is σ = 451545844662472. Its totient is φ = 99881108496576.

The previous prime is 216409068409393. The next prime is 216409068409459. The reversal of 216409068409456 is 654904860904612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216409068409459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520214106546 + ... + 520214106961.

Almost surely, 2^{216409068409456} is an apocalyptic number.

216409068409456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

216409068409456 is an abundant number, since it is smaller than the sum of its proper divisors (235136776253016).

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

216409068409456 is a wasteful number, since it uses less digits than its factorization.

216409068409456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040428213528 (or 1040428213522 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 216409068409456 in words is "two hundred sixteen trillion, four hundred nine billion, sixty-eight million, four hundred nine thousand, four hundred fifty-six".