216216182178396 has 48 divisors (see below), whose sum is σ = 572487290887680. Its totient is φ = 70538612623920.

The previous prime is 216216182178343. The next prime is 216216182178523. The reversal of 216216182178396 is 693871281612612.

It is a happy number.

216216182178396 is a `hidden beast` number, since 2 + 1 + 6 + 2 + 1 + 618 + 2 + 1 + 7 + 8 + 3 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21297885210 + ... + 21297895361.

It is an arithmetic number, because the mean of its divisors is an integer number (11926818560160).

Almost surely, 2^{216216182178396} is an apocalyptic number.

It is an amenable number.

216216182178396 is an abundant number, since it is smaller than the sum of its proper divisors (356271108709284).

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

216216182178396 is a wasteful number, since it uses less digits than its factorization.

216216182178396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42595780631 (or 42595780623 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 216216182178396 in words is "two hundred sixteen trillion, two hundred sixteen billion, one hundred eighty-two million, one hundred seventy-eight thousand, three hundred ninety-six".